Because people will eventually tire of of too many of those types of games. There's always going to be demand for every type of game. And when there's not any demand for a game, then those games won't be made anymore. You don't see a lot of point and click games anymore, but not a lot of people seem to care. Yet, one was released for the Wii.
And that's why the PS3 and 360 are so dangerous. They force developers to focus on types of games that are 'sure things' such as FPS and sequels to games. It's too expensive to develop certain types of games that are never going to sell well, though there will be demand for them.
And anyways, most of these party games aren't selling ALL that well, since WiiPlay is like $10 bucks, and ANY game would sell well for $10 bucks, WiiSports IS packed in, though it's is a lot of fun. Carnival Games only sold a million, Mario Party 8 always sells well. In a few months we'll have RE:UC, Lego Star Wars, SSB:B (now actually), and many more hardcore type games on the million list, showing that those types of games are still "in demand." You can't tell me all the people buying RE4 are buying Mario and Sonic. Consoles need a diverse library's so they can market to many types of people, and so they can gain large userbases. Microsoft has been trying for two years now to get some casuals family-friendly titles, and some people seem to think MS needs to do that in order to get mainstream appeal. Yet Nintendo comes out the gate and does it, and it's a bad thing. What?







