I did watch THE BOURNE ULTIMATUM on HD-DVD. I really paid attention this time to picture and sound quality, easy to do since I've seen the movie enough to be able to follow the plot but pay closer attention to other aspects of the presentation.
There was some moire with the HD-DVD transfer, and the Dolby TrueHD, I felt, was a little undernourished. With all the chases and fights and crashes and gun shots, the surrounds just didn't seem to be quite as active as I would have liked.
So, I will likely get the film on Blu-ray when I can find it cheaper than it is right now: $16.99. Perhaps if it shows up in my gold box at some point, I'll get it then.