Best answer: The HP Reverb G2 VR head-mounted display (HMD) includes two redesigned Windows Mixed Reality motion controllers. Despite being designed with help from Valve, the Reverb G2 will not work with Valve’s “Knuckles” motion controllers without some significant work.
The original HP Reverb employed standard Windows Mixed Reality (WMR) controllers that fell behind the competition in a lot of categories. They did offer 6DoF (six degrees of freedom) tracking without the need for any external sensors, but the headset having just two built-in sensors did cause some spotty tracking.
For tracking, there’s still a ring covered in lights at the front of each controller. Along with a total of four built-in sensors on the Reverb G2, tracking should be much better. HP claims about 1.4 times more capture area than before. The redesigned controllers will work with older WMR headsets, though the Reverb G2 will not work with the first-gen WMR controllers. Unfortunately, these controllers still do not feature any sort of capacitive touch sensitivity.
Can the HP Reverb G2 work with Valve Index controllers?
As Reddit user JstuffJr points out, the process of getting Valve’s controllers working with a WMR headset is possible. You just need to buy SteamVR tracking lighthouses for about $150, some receiver dongles, some cables, and download some software to get everything working together.
You’re looking at around $500 total for the Knuckles controllers and all supporting hardware, but this could be well worth it for anyone who needs the high resolution of the Reverb G2 and the natural input that Valve has achieved with its controllers. Otherwise, you will be using the motion controllers that ship with the Reverb G2.