I received my dev unit last night. I have to say, it's much more impressive than I expected.
I can see this being a real game changer for a slice of the hardcore gaming crowd. Maybe even getting some uptake into a wider base once the resolution is bumped up and we get more game environments built specifically for the particulars of a VR view.
Anyway, back to some GLFW3/OpenGL/Bullet Physics fun this weekend! So far the SDK has been very nice to work with. The C++ example code and wiki documents are clear and concise.