That window transparency and nView look very interesting, after using the video transparency (blended window) with my Radeon, I can see that will be an important feature. I think it looks like nVidia is starting to concentrate on more than just speed with their cards. The Personal Cinema chip COULD be a big step forward IF it is implemented properly. I'm assuming the personal cinema's external TV tuner will simply be an addon making every GF4 possibly an AIW type card, with dual head no less.
I'm impressed, the price point IMHO, doesn't make it a winner, however, the introduction of the multimedia features that may actually work could give ATI a run for their money. I just hope they don't slack on their drivers just as ATI is starting to really shine with theirs. They may find it much more difficult making all that stuff work, than just making good drivers that make their cards fast.