http://api.viglink.com/api/click?format=go&key=de2ccb8ca8943c06669720e0a267a9f6&loc=http://www.neogaf.com/forum/showthread.php?t=684081&v=1&libId=b012b37b-e934-441f-a87e-2fb64e9b3124&out=http://www.destructoid.com/xbox-one-interface-is-clean-uncluttered-262315.phtml&ref=http://www.neogaf.com/forum/forumdisplay.php?f=2&title=Destructoid: Xbox One can run four apps at the same time in the background - NeoGAF&txt=Destructoid&jsonp=vglnk_jsonp_13799037195226
Penella signed into the dash by just waving his hand. Actually, work went on to do so in the background before he even did that, as the Kinect was already seeing and trying to recognize everyone in the room. Waving was more of a confirmation that he was the one that wanted to sign in. From that confirmation, Xbox One pulls down all of Penella's settings, just as he had set up in Redmond, including all of his saved games, apps, and settings.