It's kind of hilarious that every time there's an Apple TV update, I see comments complaining that iTunes Extras don't work on the Apple TV, and then when they release an update that adds that functionality, everyone gets angry and demands to know what kind of ancient, backwards person would dare to even use such a feature... sheesh.
I have not been one of those clamoring for it, by the way, and I've seldom watched the iTunes Extras (mostly because they were SD and looked awful, ha), but I will probably use them a lot more now.
I know we're all waiting for a major overhaul, but can't we just be glad for once when they add features that yes, a lot of people HAVE been asking for?