It looks pretty good to me. Not the most impressive I\'ve seen of next gen, like Gears of War, but nice. I\'m less concerned with the visuals than I am with the gameplay though. The Sonic Adventure games were better than average, but left a lot to be desired as far as what a Sonic game should be.
I do think there is potential for a really great 3D Sonic game because I\'ve seen it in bits and parts across Sonic Adventure and the sequel (I haven\'t played Sonic Heroes yet). The first level of Sonic Adventure, the beach, is great, and who could forget the whale busting up the pier? Then my favorite level of the series, Windy Valley. A pure adrenaline rush that, imo, Sonic Team hasn\'t been able to top since, but they came pretty close with the forest level in Sonic Adventure 2.
The boss fights have definitely improved upon moving into 3D. All the fights with Chaos in SA were alot fun, especially the very last battle as Gold Sonic. I also remember the fight with Robotnik being among my favorite this gen. It\'s really too bad that these great moments were broken up by platforming. Platform jumping and attacking enemies has never been Sonic\'s strong suit, and should be avoided except in situations where they keep Sonic moving along. I think there\'s a chance we could see a great 3D Sonic if the game is built with speed in mind, and they (Sonic Team) stick to it.
Oh, and I would love to see a next-gen 2D, or 2.5D, Sonic.