Your profile information is to the left, while "Snap" (more on this later) and "My Collection" are stacked on the right, completing a fat "U" of app tiles cradling the active game's window.
Snap is another bit of neatness in the Xbox One's OS, allowing you to pull up a vertical sliver of a second app and stick it alongside your primary program. Think of it as a second screen experience on the big ol' first screen (making SmartGlass ... the third screen?). Though it's probably most useful for snapping an Xbox-tailored app to sports television, there are plenty of gaming-centric pairings too. Microsoft says you could watch Star Trek: Into Darkness on Xbox Video, for instance, while you wait for online matchmaking to get going in a shooter. (That pairing is particularly apt, because both feature magical respawning.)
Snap is initiated from the dashboard, but it can also be done by uttering "Xbox, snap" and the name of the program, which is resized before appearing seamlessly on the side. For once, I can see (hear?) myself using a voice command rather than backing out to the dashboard. And maybe I think it'll be fun to say "Xbox, snap this" and "snap that." Maybe I want there to be an official Snapple app to snap so I can utter the most ridiculous thing anyone has ever uttered in their living room.
You can't run two active games alongside each other, however, because the OS gives priority to the likes of Forza, Dead Rising 3 and Need for Speed: Rivals, Whitten says. As he says it, I recall the big window looking onto Forza 5, still sitting there in the middle of the home screen. Between your recent queue and Pins, which are assembled to the left of the home tab, games are not buried here, as you may have feared.