As someone developing for VR I'm not sure I'd want to go on a weekend long "I'm gonna play through all of HL3" binge.
Even simple VR games can make you feel like you're moving when you're standing still or back you into a corner with enemies. HL3 might screw you up a little. HL2 did a very good job of matching the scene to the plot and that made for a more immersive experience. Add in VR and modern graphics and that's a level of realize that would probably be too much for a few people.
