MojoKid writes "The Xbox One has both HDMI-in and HDMI-out capability. The point of HDMI-in is to allow you to hook up a cable box, with output then running from the Xbox One to your television. As it turns out, however, that's not the only thing the Xbox One can do. Since the HDMI-in port is a standard option, it can accept video input from a PS4 and also accept a video stream from a PC. According to Xbox senior director of product management, Albert Panello, "any application can be snapped to a game... this could be the live TV feed, so if you wanted to play Ryse and Killzone (a PS4 exclusive), you could snap that." Keep in mind, snapping a title to the Xbox One doesn't mean that you can actually keep using Xbox One controllers in the game. If you want to snap in a PS4 game, you still need PS4 controllers. If you want to hook a PC into the Xbox One's video output, you still need mouse and keyboard, though if the Xbox One's controllers are eventually PC compatible, then you might be able to use the same controller on both platforms without doing much more than flipping a switch." 
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