The rise of virtual-reality headsets, including the HTC Vive and Oculus Rift, has led to a surprising arms race in gaming desktops, a category that's languished in the past few years.
Adding fuel to the fire is a new generation of graphics cards, the most important component in a gaming or VR-ready PC. Nvidia has new desktops cards, led by the GeForce GTX 1080 (replacing the previous-generation 900-series cards). At around $600 in the US (which works out to £560, AU$815) it's reasonably...