500K people already using Google's cardboard VR headset

OVERWHELMING RESPONSE: Google has shipped 500,000 Project Cardboard headset kits.

Samsung and Oculus Rift may be generating much of the excitement around the concept of virtual reality headsets, but Google is the one clocking up the sales. 

Since launching its somewhat whimsical take on the smartphone-powered Virtual Reality headset — Project Cardboard — back in May, the company says that there are already over 500,000 do-it-yourself headsets in use.