Disney HD on Xbox Live... but not iTunes

I'm not sure how closely you're all following E3 (the big gaming convention going on this week in LA), but one of the tidbits of news dropped by some little company named Microsoft last night is Disney movies are now available for download on Xbox 360's Live Marketplace. Finally, just like all of us iTunes users have been doing for months, Xbox owners can enjoy Disney flicks via digital distribution.

But wait-- the Xbox flicks are available, right now... in HD. Wha? Is Microsoft's CEO the largest Disney shareholder and on their Board of Directors? Did someone from Microsoft run the animation company that turned Disney animation around? Why are Xbox 360 owners watching these movies in HD when we can't do the same on iTunes?

We've speculated before that HD movies would be coming to iTunes, but right now, Xbox 360 owners can see every single hair on Ariel's head, and iTunes purchasers cannot. What's wrong with this picture?

Thanks, James H.