I think this is great news, there have been a lot of great downloadable games like the 2 Seece mentioned, and stuff like Wipeout HD, Flower, Trials HD, Gemetry wars.
The only thing i dont like about this move by sega is that they wont release it also on the Wii, thats a huge mistake, im sure it would sell the most there, but perhaps its because it's truly in HD?