Just read on another website that Iron Man is currently showing as a HD video purchase in the iTunes Store... has anyone else been able to confirm this? If not, it is definitely a sign that Apple is testing for things to come (hopefully soon!)...
http://www.appletvjunkie.com/hd-movies-now-available-for-purchase
http://www.appletvjunkie.com/hd-movies-now-available-for-purchase