https://www.techradar.com/news/new-htc-vive-feature-sets-resolutions-of-your-games-to-improve-performance

VR headsets have had a shaky start despite their obviously awesome nature: Oculus has only sold around 200,000 headsets while the golden standard of VR, the HTC Vive, has shipped even less - around 160,000 units since launching in 2016. 

One of the reasons that sales might not be rocketing through the roof is the HTC Vive’s relatively stringent specs list that asks users to have an Nvidia GeForce GTX 970 or AMD Radeon R9 290, and an Intel i5-4590 or AMD FX 8350 CPU.