A few days ago iOS hackers managed and brought iOS applications on a jailbroken Apple TV and now one of them posted a variety of photo iPad applications to run in full screen 720p, on the Twitter. Apparently, the applications can be enlarged and cover all the size of the screen or operate a window system for the easier management. So far, the hacker Steve Troughton-Smith has posted photos of iPad apps Grace, YouTube and Facetime run, and referred to that of Facebook.
Unfortunately, there are even instructions on how to manage running applications on a jailbroken iOS Apple TV. Logically there are still many bugs to be resolved, but it is a matter of time until we see their inclusion in any of the future jailbreak.