The mobile and (almost) wireless VR that's accessible with these accessories in conjunction with smartphones is incredible. I'm most excited about how easy it is to introduce "VR virgins" to this new space.
I spoke at a business event in Brazil last month and afterwards 10% of the attendees personally came up to me to talk about VR, what it could mean for them, and, of course, to try simple VR (Google Cardboard).
Even after the Oculus Rift comes out, smartphone + headset will remain the way that most people experience VR for years to come. But the smiles when someone tries it for the first time...that's what tells you this is something special!
Gracias!
thepza