Rick Duim has no idea what he is talking about.
#1. you do not register any personal information with Microsoft or anyone else when you register to watch WM9 HD material. You do not fill in any forms or anything of the sort. When you put the disc in, it checks to make sure the disc you are attempting to play is a legitimate copy and that is it. After your 1 week viewing period is up, it just checks once again to make sure your copy is legal, and gives you another week, you could do this forever! There is no limit to how often or how long you watch the material.
#2. This is true High Definition video. It looks STUNNING! If you have a computer powerful enough to play it it is WORTH IT! There are DVD players coming out at the end of the summer that can also play WM9 HD material, so you will not need a computer. I use a HD projector on a 14 foot wide screen to view my WM9 material, and it is better than going to the movies.
Until HD DVDs come out (probably not for 2-3 years or longer) there is not really very many options to use your HD display with HD material. Regardless, the movie is great in HD or not, so get it for the movie itself, and if you want to see it in High Definition, at least you have the option.