Valve's new Steam survey for June 2016 revealed that 56% of gamers are using an NVIDIA GeForce video card of some kind, while AMD Radeon cards are used by 25% - and it also saw Windows 10 become the most-used OS by Steam gamers, with 40% of gamers using Microsoft's latest and greatest OS.
But what about VR? The latest Steam survey has 66% of gamers using the HTC Vive, while just 27.7% of gamers are using the Oculus Rift. The Oculus Rift DK2 headset is still being used, for now at least, by 6.2% of gamers - but these numbers are dropping every week.
Personally, I own both the HTC Vive and Oculus Rift and would always recommend people to buy the HTC Vive. It's a better VR experience thanks to the room scale technology, while the Rift is a seated only experience - for now at least, and even with the upcoming Touch controllers, you'll just be standing around with the Touch controllers, not walking around the room enjoying the VR experience.