it's not going to happen - eventually not even because they can't do it, but because they no longer want to - imo ED will be faded out and run for as long as the revenue from it justifies running the servers and paying staff. There isn't much to expect revenue-wise, so they will reduce the staff working on it and just maintain a service crew to it's end.If games like No Man's Sky which possibly have a smaller team than FDev can make walking on planets in VR a thing with the VR controls then I can't see why FDev can't do the same. Graphically NMS is more intense on the surface of the planets as it has to render and track the animals, weather patterns and sentinels. In Elite Dangerous the planets are just empty rocky landscapes with maybe a base with some npcs. No weather systems, base building or trees that sway in the wind.
VR in Elite Dangerous needs to be done right and to use the VR hand Controllers when on foot so we can access the UI via them. Or even make the VR controllers our hands in the game so instead of pressing "E" to activate we actually push the button with our VR finger.
If FDev put work and thought into this side of it they could make a very unique VR game and space sim. But then this is FDev we are talking about.