Sooner or later Pokemon will probably move to that format with their 3D games, but since this is the first actual 3D Pokemon game I will enjoy it. I have always thought that Pokemon could be a good place for an MMO at some point. Many things would have to be considered for it, but I believe it could be pretty awesome.
They could do many things with the new technologies since the last Stadium game. A new Snap could easily be done with the Wii U and some sort of Pokemon fighting game where you control your Pokemon instead of the RNG (probably for any sort of MMO), although something as you described would be equally as good.