That would only work for vorpX’s second render step, i.e. when the image is sent to headset, but not for the games themselves, which are rendered before that. So unfortunately it doesn’t really make much sense for vorpX.
Even if it would work in principle, due to the technical requirements (forward renderer, MSAA support) only a small fraction of modern AAA games could use it, most of them use deferred rendering techniques and do not support MSAA.