Game/Music/Anime crossovers

I'm seeing more characters being used in different gaming programs and music video generators. If you follow Miku Hatsune on YouTube like I do, there are lots of redesigns using costumes from anime shows, and video games. I'm wondering how long it's going to be before we start to see them show up as avatars in places like Second Life and other virtual worlds.Of course there's a possibility that they are already there, since I've not been in SL for a while.