Because "Xbox 720" was ultimately kind of a dumb name, Microsoft wisely went with something different for its new console: Xbox One. At Microsoft headquarters today, the Xbox crew debuted Xbox One, showed off its new features, and promised to give us more at E3 next month.
One of the more impressive features of the Xbox One, at least at this point, is the enhanced voice and gesture controls it offers. With a simple voice command--"Xbox On"--you can turn on your Xbox and launch into your personal homescreen, which will remember what you were last doing.
On the slightly more technical side of things, Xbox One was built with three separate "operating systems"; one is of course the Xbox One architecture, but there's also a Windows kernel on board as well as underpinnings that allow instant switching, multitasking, and other user experience-heightening features...