It may be that other developers are finding that their games play better on one platform over the other, so they're choosing to migrate to that platform.
Sid MeierA good game impresses you with what you're doing. I think that's a fundamental difference that I as a game designer need to recede in the background.
Sid MeierDinosaurs was a cool idea, but we just couldnt find a way to make it really fun. Weve got a bunch of great game ideas that we want to bring to life over the next several years.
Sid Meier