I don't think it's market saturation.
People are getting smart.
Many people bought a Wii for Wii sports (moms, grandmas, grandpas, great grandmas, your sister, wife, w/e). They played Wii Sports and thought it was the best thing since sliced bread, they played it to death and want more.
So what do they do? they go to the store and see "My Sims" with it's cutesy mii-like style, it looks familiar so they try it out. When they pop it in and realize "wow this game sucks, not nearly as fun as wii sports", they get angry. Now that game has a bad reputation and you won't dupe the same consumer twice.
This is good, Game developers actually have to try to make a decent Wii game, no more cashing in on the ignorant casuals who never bought games before.
Boom Blox is the only outlier there, but it took ages for the first one to sell what it has today.
Also, if this applies to you, look at how many POS games you have for your very first system, it might surprise you, I got tons of crap for my NES / SNES. Who bought you those games? mom and dad. the same people who are being targeted by Nintendo with the Wii. Now as you got older you started telling them don't buy these games, and eventually you buy your own games. The expanded audience has no knowledge of what game developer is good or not, what games are good or not, they don't go to gaming sites like we do so they just go buy what looks or sounds good.
Now that they've had a Wii for a while they have a better idea of what's good and what's not.







