I've had a play around with the latest (009RC1).
In Ultima Ascension, there is no appreciable difference between it and 008 final. The windows mouse pointer still hangs around onscreen.
I've also tried OpenGlide with Summoner. It was pretty much unplayable under 8 and most versions of 9. RC1 has it working pretty well (there is a horizontal strip at the top of the screen that does not render properly - stays mostly blank, but does try to render - it''s about the same height as the control bar at the bottom of the screen, or of a cinematic border).
The driver does not appear to do any filtering at the moment either (everything seems to be point filtered only).