they did not talk about the next iPhone hardware at all either, my guess (and I repeat MY - very personal opinion) is that they will talk about it along with the new hardware (iPhone 2012 & maybe the TV set) at a later point.
Really? The biggest apple:TV) rumor was an app store. If they were going to open it up to third party apps (and/or some kind of television was coming "soon" with third party apps), wouldn't WWDC be the very best place to talk it up (and get the developers developing)? Get the APIs in developers hands so that there was lots of "wow" when the store would go live?
I see that 9 to 5 Mac has a picture of the developer page, it shows apple tv beta, but it lists is as to test AirPlay with iOS 6.
I guess our next hope for an Atv app store will be with the new iPhone release in the fall. I am hopeful that mountain lion AirPlay works do well people will make apps designed to stream to the box full time.
Wait!!! I finally figured out why there was no mention of the aTV update today. It's such a huge game changing update that they didn't want it to over shadow the hardware and OS updates they announced today. They want it to have it's own civilization changing announcement. I guess in that case....I can wait a while longer.
Edit: forgot to mention industry changing, culture changing, and....DNA changing!!!
Apple TV updates traditionally occur in the Fall. Yes, the Apple TV will get iOS 6. However, Apple always withholds major (and sometimes minor) end user features from the Apple TV software developer beta until they're announced.