The device, which will cost $499, will be released November 7.
Microsoft is also planning to make some games from its original Xbox games available to play on the Xbox One, though the company didn't say when.
Microsoft also announced a slate of more than a dozen games, including crowd favorites like the upcoming Assassin's Creed game from Ubisoft --which is coming out later this year -- and the hotly anticipated cartoony game Cuphead, which is planned for this September.
The company didn't make any announcements regarding its key sci-fi military action and shooting franchises Halo or Gears of War, but it did show dozens of other titles.
It doesn't yet have a release date.
PlayerUnknown's Battlegrounds got some time on stage as well, to highlight Microsoft's game streaming service Mixer.