After PCs and mobile, a chip battle for VR devices is brewing

Millions of people will buy VR headsets in the coming years to play games and view 3D content, and those sales could spark a real-world war among chip-makers.
Some new VR headsets announced at this week's Game Developers Conference in San Francisco are full-on computers, and others need to be hooked up to PCs with powerful graphics cards, similar to Oculus Rift.
The VR devices, designed for gaming and for roaming 3D worlds, are a showcase for the graphics technologies of chip makers like AMD an