As it does every year, Google's keynote kicking off the Google I/O developer's conference included a laundry list of updates on projects we knew the company was working at, along with lots of announcements and previews of new products and features Google is just beginning to launch. Here's a rundown of everything you need to know from Google's Avengers-length keynote.

Android M

The successor to Android Lollipop, previewed at the same time last year, little is known about Android M -- including what the M stands for -- but Google let slip some important new features in its I/O keynote.

Perhaps simultaneously the most quotidian and exciting new feature coming to Android M is a battery-saving mode called "doze."

Like the name implies, Android doesn't fully shut off or go into a deep sleep in doze mode -- priority messages, alarms, and phone calls still wake the device up instantly -- but using motion sensors to tell when you are not using the device, Google said doze can boost battery life in devices up to twice as much as Lollipop in standby mode. That's big.

Chrome Custom Tabs is another new feature of Android M that generated some excitement. It allows third-party apps to use Chrome as its in-app browser, though it's still their choice whether to or not.

It may save developers the trouble of building their own in-app browser from scratch, and it will definitely save users time they'd normally spend waiting for their devices to launch a browser and switch away from apps when clicking a link. Speaking of which, there's also a new app linking feature that lets apps verify links that switch between apps more quickly.

In a similar fashion, when devices using the advanced USB type-C connection begin to appear on the market, not only will Android M support it, the operating system will give you advanced controls over how you use your USB type-C connections: depending on if you want to transfer data, use an external peripheral, charge your device, or charge a device from your device. Sounds pretty universal -- finally -- for a Universal Serial Bus.

Google also announced the launch of Android Pay, its rival to Apple Pay (though until this week, we thought that was Google Wallet). It seems Google is trying to get all its eggs into one basket this time to match Apple's challenge, and according to Quartz, there are already some 7,000 merchants that have signed on for the tap-to-pay system. 

Android Elsewhere

Of course, Google is about more than smartphones, so it announced some exciting additions and updates to its Android lineup in the home, on the wrist, and in the car.

Chief among these is HBO Now, which is coming to Android after Apple's 3-month exclusivity period is finally about to drop. HBO's standalone $15 per month streaming service will be coming to Android devices, Android TV (like the Nexus Player and the new NVIDIA Shield Android TV device), and, of course Chromecast.

Google also mentioned that it sold 17 million Chromecast devices since it was announced two summers ago, with over 20,000 apps now available for the HDTV streaming dongle.

For Android in the car, there's Android Auto. And though you may have heard of that term and never seen it for yourself in an actual car, that won't be the case for long. Google touted that 35 car manufacturers are signed up for the system, and just this week, Android Auto appeared in its first consumer automobile on the market, the Hyundai Sonata.

Android Wear, for smartwatches, got a new feature, as announced in the Google I/O keynote. Google announced that now there are about 4,000 apps for Android Wear while announcing the "Always On" feature, which keeps apps on the screen, and the apps' information visible at a glance, even while the watch is in low power mode. Android Wear also introduced a couple new wrist gestures, like flicking your wrist to scroll up or down, to help with one-handed operation.

Google/Android Everywhere

If you're worried about the NSA knowing everything about you, at least soon you'll be able to experience some convenience out of such all-knowing digital power in the next big update to Google Now.

Called "Now on Tap," Google is making your smartphone smarter and your life more convenient (hopefully) by vacuuming up as much contextual information about you as possible and proactively offering information based on what app you're using, where you are, or what you just did. On a trip out of town, think: Directions to the airport, followed by where to park, followed by displaying your boarding pass, followed by the option to order an Uber when you've landed.

In app context matters too, for Google Now on Tap: If you're listening to Skrillex, as per Google's example picked up by The Next Web, you can ask Google, "What's his real name?" and Google Now will pick up on the fact that you're inexplicably still listening to dub step and will find the right contextual information for you. Google already has over 100 partners for its next-generation Google Now system, and you can bet more is on the way.

Google also wants to become the place for photo storage, announcing Google Photos as a standalone (non Google Plus) cloud app that will back up all of your photos for free and help you organize them by people and place -- without any need for user input like tagging. It will also make videos and collages based on the context of your photos and auto-create movies you can edit and share. Google Photos is available now for Android, iOS and online.

Finally, as the Internet of things is still in its nascent phases, Google is getting in on the ground-level organization side of things with two IoT projects: Brillo and Weave. Both independent of each other, Brillo will act as the base-level Android for the "things" that the "Internet" will eventually be "of," while Weave acts as the communications language for everything to communicate with each other.

Listed all together, it's a lot of new tech to take in, but while some of these new projects are live now (Google Photos) or coming very soon (HBO Now on Android TV and Chromecast), others will take much more work and development before they're ready for consumers. It is a developer's conference, after all.