How minimal could the hardware be, while still making a compelling experience? Even top wireless gaming headsets are still bulky, in this age of miniturization of electronics. (And I prefer my bulky Corsair headset with my Vive more than their earbuds.)
Can a device similar to Google Glass hold enough compute and storage to create a compelling VR experience?
It's the least we could do, if we're not going to return to the Moon in our generation.