Earlier this weekend, GameSpot quoted Microsoft executive Albert Penello as saying that folks who get both the Xbox One and PlayStation 4 consoles this fall could connect the PS4 to the Xbox One's HDMI in port. He was also quoted as saying " ... any application can be snapped to a game…this could be the live TV feed, so if you wanted to be playing Ryse and Killzone at the same time, you could snap that."
Penello made those statements during the Tokyo Game Show this week. As it turns out, GameSpot didn't quote Penello completely. Today, Penello took to the NeoGAF message boards to offer his clarification on this matter. In short, he doesn't recommend that Xbox One and PS4 games mix together.
I'll get back with a more detailed story, but long story short it won't be a great experience, and I indicated as much in the interview which wasn't included. HDMI latency is fine for video feeds, but not great interactive.
So while in theory you could show off how you can have a live Xbox One and PS4 game on screen at the same time, the PS4 game's latency will likely make actually playing games on the Xbox One's user interface a bit of a paid. Oh well.
Source: NeoGAF | Image via Microsoft/Sony