Definitely. The Wii was a high risk system. But the risk has paid off (Dev kit shortages anyone?). It makes me sound like a PS3 player, but more games will come. I just can't wait to see where these cheap dev kits are going to take the industry. For once any genius Tom, Dick or Harry out there, they will be able to dev games for the Wii. Though either downloads or proper discs we will be getting plenty of indy/creative games.
I just really hope the Wii brings us closer to the golden age of gaming, aka. the Amiga. Just being able to walk into a shop and buy a game from a bedroom coder. Public Domain needs to rise up again and from a money and ease of developing PoV it will only happen on the Wii
The only problem with offering 3rd party games for download is the Wii's relative lack of storage capacity.
I don't know how open Nintendo is to small indy developers either. I've always had an impression of them being a lot like Apple; obsessive about controlling the quality of the user experience and not allowing any 3rd party product that might diminish this.
It should be good to see what future Wii games bring - as long as it's not balance a marble, or egg and spoon races (I honestly expected to see that in Zelda!). I do hope they adjust the aiming experience for users (for instance if you aim the bow in Zelda but the crosshairs goes off screen, a modal error message comes alerting you to aim at the TV, which just (again) jars you out of the game ambience.