Well, the system has only been out for a few months, so it's not fair to expect to see the full capabilities of what the Wii can do yet. However, what's bothering me so far is the lack of confirmation that things are going to get better. Sure, the big Nintendo franchises are all set to look good (I won't say great yet, nothing I've seen of Nintendo's upcoming titles look like they couldn't have been done on the Cube), but the handful of future third party games we have seen kinda look....blah. They all look like they could have been done on the Cube. Heck, I even have to admit that my most anticipated third party game, No More Heroes, looks like crap (with the exception of the character models). For me it's not that we're not seeing that new gen style now, it's that we have no proof that we're ever going to see titles that look better than what the Gamecube did. No announcements, no screen shots, nothing.
Then again, this could all be Nintendo's fault. It is my personal belief that the reason we're not seeing a lot of new projects being announced for the Wii yet, or any games that seem to be pushing the envelope (with the graphics OR the controls), is because Nintendo waited until the absolute last minute to reveal any details of the Wii to developers and get out dev kits so they could start creating. Remember, with the exception of a few key people, developers were finding out about the Wii's features just as the public was, and MOST didn't get their dev kits until just a few months before launch. Everyone was wondering what the hold up was. If any developer wanted to take initiative in developing a game for the Wii (and not many did, looking back at the failures of Nintendo's previous two consoles), they had to use Gamecube dev kits. In that kind of environment it makes perfect sense that we're not going to see games moving out of Gamecube and into Wii territory anytime soon. I honestly don't see that happening until late next year.
I know Nintendo wanted to keep a tight lid on the Revolution to keep Sony from finding out through a developer and stealing their ideas (again). But I honestly think it would have been worth the risk if it meant getting developers up and creating Wii games a lot sooner than this.