Yeah, I too am very interested on knowing this.
As I've said over at
phoronix, I'm a big nvidia fan, have a crapton of nvidia cards, from riva tnt's to a couple of 9400's, and I think you can't beat nvidia if you want performance, stability, and nice video playback on linux.
If most laptops from now on only offer optimus, does this mean that it'll basically be useless for linux users to buy such laptops?