(Exclusive to Wii)
Sonic and the Secret Rings
Sonic and the Black Knight
Mario and Sonic at the Olympic Games
Mario and Sonic at the Winter Olympic Games
Sonic Colors
(Exclusive to 360/PS3)
Sonic Free Riders
Sonic's Ultimate Genesis Collection
Sonic the Hedgehog (2006)
Dreamcast Collection
Sonic Generations
(Dreamcast Collection contains 1 Sonic game not available for Wii, while Sonic's Ultimate Genesis Collection contains 5 Sonic titles, which, while all are available on the Wii, are available as separate purchases, which when added is more expensive than the Ultimate Collection; additionally, this collection received a bunch of other Genesis titles, which bolsters the actual buying price.)
Seems about right. To be honest, though, the 360 version of Sonic & Sega All-Stars Racing is vastly superior to the other titles, including 2 exclusive characters and featuring the DLC that the Wii doesn't have. So I suppose that one could possibly be added underneath PS3/360 exclusive, but it really doesn't matter. A few of the 360/PS3 titles are also on PC, so I edited in PC, as PC typically gets games that the 360/PS3 get, as opposed to 360/PS3/Wii.) I didn't count Zero Gravity for the Wii because it is also a PS2 title, nor did I count the single releases of the Sonic titles outside of the two collections listed, as they are also technically available for the Wii. Also, Sonic Colors is also a DS title; the titles are vastly different, however, so I don't think it'd be fair to count the two as the same game.
Regardless, this certainly looks interesting. I'd like to see some actual gameplay, though.