I installed the trial version on PRE9. Very similar to PRE8 but I did notice one very compelling reason, for me at least, to upgrade.
I use footage shot from a Canon HF-20 That is 1920X1080P 30fps. In PRE8 if I add this to the timeline, even trying all sorts of different project settings, it always added the dreaded red-line above the footage.
In PRE9, I use the same preset and voila, no red line and no need to render the timeline, unless I make changes of course.