Paul Thurrott posted a new article about SmartGlass. Apparently, it's an updated version of the Companion.app already out for iOS, Android and Windows 8.
The second screen stuff only works with new games that take advantage of that developer API (although I expect Microsoft will update some of their first party titles)
http://www.winsupersite.com/article/xbox-360/xbox-360-xbox-smartglass-preview-143334
The second screen stuff only works with new games that take advantage of that developer API (although I expect Microsoft will update some of their first party titles)
http://www.winsupersite.com/article/xbox-360/xbox-360-xbox-smartglass-preview-143334