I see so many VR fanboys going wild over this thing, and we still barely know anything.
I strongly doubt it will be the Generation 2 that everyone wants so badly, nor do I believe that there will be anything special about the headset that will make it fly off the shelves any faster than the other headsets. Finger tracking is neat in theory, but I don't believe it will have any real practical use, and the knuckles won't be that special thing that makes the mass market pick it up (Having the controllers attach to the hand so you can let go is smart though).
Valves name isn't gonna make hardware fly off the shelves either, the steam controller can attest to that, Gaben is not some kind of god who can do no wrong.
The best thing valve can do for adoption, is make the headset inexpensive, not too difficult to set up, and have some VR exclusive games at the ready, like a brand new Portal, Half life, Left4dead, those kind of games.
As long as PCVR requires a decent gaming PC to use, I can't see it ever rising above niche.