Two things are interesting about this generation.
1: As of right now the wii is the leading console in the market thats got the least amount of benefit from being the leading console. Thats for a number of reasons that aren't worth going into, but it will change.
2: The other consoles in the market are for the first time getting just as good announcements as the leading console. Its not a one horse race anymore.
What does this all mean? The games industry is growing and it can effectively accommodate several consoles. This is a good thing.