I know some VR games do full body tracking, Blade and Sorcery for example has it but obviously requires a VR set that can support that, such as the Index. But yeah a lot of headsets are going with built in tracking cameras like the Q2 which is great IMO, and a big reason I went that route, so stuff like that probably isn't going to be implemented in a lot of VR games.
Also, if you have a solid PC then the Q2 is a great option for PCVR, so long as you don't mind the FB requirement. I'm so impressed with the wireless capabilities of the headset, and the wired options are insanely good with the right hardware. The only limitation I'm not a huge fan of is the FOV but I guess that really depends on your IPD, it's noticeable for me but forgivable considering how good the image looks.