Now, for the brand new "we gotta have it!" things from iTunes:
HD movie purchases
HD music videos (I know "J**z in my Pants" is because it's HD on YouTube)
iTunes Plus audiobooks - I'd love the option to get at least 128k audio for a book instead of 32k. Give us the SD/HD option like we have with TV shows. It just sucks to get an AM radio-quality product for that much moolah.
A la carte upgrades to all! I bought Dr. Horrible's Sing-Along Blog before HD was available. Why can't I pay the $3 to upgrade the 3 episodes?
Lower prices on season passes. Don't start kidding me that a season of Bones is worth $60 on sub-Blu-ray HD. I paid $50 for Lost Season 4 and $40 for Smallville Season 7, and those had much better quality than downloads will have for years. C'mon, movie studios!