Thomas, looks like you're not alone in your thinking:
It might just be that indie games have already covered a lot of ground, and finding new ways has gotten a lot harder. Though I do think that we’re living in a time period where people don’t really want to stand out by doing something different, but rather by excelling at something that’s already been established or simply gaining success by riding on the waves of whatever’s popular at the moment.
http://news.killscreendaily.com/post/12969577991/have-indie-games-lost-their-spark
The problem of diversity?