The big vendor prefix discussion comes and goes in waves, but one conclusion that always pops up is that these prefixes should have a shorter lifespan. Of course browser makers may shift the responsability to specification writers, arguing that specs take too long to reach Candidate Recommendation (CR) status. Well, it seems the unprefix express is finally picking up steam.
This is all great news. Even better, as Lea Verou noticed:
Keep in mind that this means you don’t have to use the -ms- prefix at all for transitions, animations and gradients, since no stable build of IE was ever released that requires it.