Well, we have powerdvd 9 that came with our blu-ray drive in our desktop. The wife put in a blu ray to watch while she did something in the kitchen. The software asked her to update, which she refused, being reluctant to change the software while I wasn't around. When I tried to play the bluray, the software fails to play, wth no update prompt... This happened with three different blurays I tried.
The wife reckons bluray is more trouble than it is worth. Perhaps she is right.