The basic principle proven so far is that, with an invasive surgical procedure, retinal function can be permanently replaced with technology that electrically stimulates the retinal ganglion cells (i.e. the side of the optic nerve that terminates in the eye) - and that it works in some blind people.

This predicts nothing about augmenting the optical input in people with healthy eyesight. I mean, who is going to volunteer to have their normal eyesight irreparably damaged to play a VR game?