Another big yes to the Skies of Arcadia HD camp, man I love that game, comes number 1 in a list of 1!!
Heavy Metal: Geomatrix HD with online play
Resident Evil : Code Veronica HD
Giga Wing 2 HD ... Probably my favorite scroller of all time
Sonic Adventure 2 HD obviously.
Alien Front Online HD
Cosmic Smash HD for Kinect
Grandia 2 HD
Metropolis Street Racer HD with online racing
Phantasy Star Online : Version 2 HD
Star Wars Episode I: Racer HD Online
That should do for starters, and would make it difficult to fit in any new games