Yeah I was ok with giving up XBMC because the Plex hack still works on the ATV3. (All I really wanted either hack for was accessing the comedy central feed of the Daily Show, anyway.)
I might have been interested in an App Store for the possibility of an Elgato EyeTV app, which would hopefully eliminate the step between recording shows in EyeTV on my mac and then having to transcode/export them to iTunes so they could be viewed on the ATV. With an EyeTV app on the Apple TV, hopefully I could access EyeTV on my mac directly.
Except, well, I already sort of gave up on EyeTV when the Channelmaster DVR+ came out. The channel master is just much simpler to use (by me and by my wife). My first method for recording and watching over-the-air high-def TV shows was:
Antenna --> HD Homerun --> EyeTV on Mac --> iTunes on Mac --> Apple TV.
An EyeTV app on the new Apple TV would shorten this chain to:
Antenna -->HD Homerun --> EyeTV on Mac --> Apple TV.
But, with the DVR+, my chain is just:
Antenna --> DVR+
So I'm not really excited about the new Apple TV. My current setup meets all our needs, and the new version doesn't add anything we would use. (Siri is only useful in Niche circumstances, as I've found on my iPhone.)