A full blown AppStore would be great but as a minimum it really needs an Apps channel so that at least the streaming services that are in the AppStore can get on to the AppleTV.
I'd really like to buy one but in Australia the useful is really limited, if i could get all the content I can get on the iPad, then I'd buy for sure.
If you want it as an option, but it would suck as the only option. A tactile controller is much better (don't have to keep looking at the controller to see where your fingers/thumb should be)... And if you want more than one??? Pretty expensive controllers.