Something that I thought was long lacking is now possible;
buying movies via Apple TV directly instead of going through iTunes.
Will you buy via iTunes or through your Apple TV?
I bought a couple of movies, but have since decided against it; at least until the picture quality improves greatly or I can buy HD movies at a reasonable price. For example, I downloaded Pirates of the Caribbean II from iTMS and got a lower quality picture and regular stereo sound. In some cases, I can get the DVD for the same price and for the additional cost of a couple hours' time via Handbrake, encode the DVD at a higher bitrate and get 5.1 surround sound.
For me, the convenience of downloading doesn't make up for the lower quality.