AT&T's ultra-fast Internet service, which uses fiber-optic lines, will start expanding into 38 new cities next year. AT&T GigaPower will be offered in 56 metro areas next year after the expansion.

GigaPower is capable of delivering download and upload speeds of 1 gigabit per second, CNet reports.

With speeds that fast, Internet users will be able to download 25 songs in less than a second, a TV show in three seconds, and an entire movie in less than 36 seconds.

"The faster speeds offered through AT&T GigaPower keep consumers and small businesses connected as they are accessing more content on more devices," Brad Bentley, chief marketing officer of AT&T's entertainment group, said in a statement.

Cities like Detroit and Los Angeles will soon be able to enjoy the extremely fast speeds of GigaPower, when they are offered the service next year.

While more Americans using the Internet for everyday tasks, like shopping, watching TV, communicating with friends and family, and even taking college courses online, even with the expansion of GigaPower, only a small amount of Internet users will be able to enjoy such speed.

"There's a long way to go before these speeds reach a significant portion of the United States," said Jan Dawson, chief analyst at Jackdaw Research.

Google started a movement to increase the speed of broadband services with their Google Fiber service in 2010. However, boasted speeds are really more of a marketing gimmick, and most Americans are fine with much slower rates.

Dawson added most households can operate with speeds of 30 to 40 megabits per second without experiencing major pains.

AT&T's new GigaPower service will be competing in several cities with Google and other competitors offering alternative fiber networks. Dawson believes AT&T's large presence in the telecommunications market will help them compete better than smaller companies and Google.