We just got our sample of this laptop.
3D is pretty good, the eye tracking works well following you, if you move fast enough for it to lose lock it takes 0.5 - 1 second to re-aquire you.
Out of the box it can only play 3D blu-ray which makes it pretty useless, but this guy http://coxcoppes.nl/screenmodechanger/
has created a nice utility to turn on the 3D tracking so you can play any 3D video (side:side or interlaced).
ps The big breakthrough compared to the old Sharp/Philips technology is that this barrier can turn off to convert back into a 2D screen for normal use.