I suspect VR workstations will help with this. Many ergonomic constraints come from ease of mounting monitors at eye level. With VR this problem no longer exists. You can be in any position you want - lying down, standing, sitting cross-legged on a cushion on the floor, etc. - and as long as you can type with separated keyboard halves for each hand you will be productive.

Perhaps we should not be chasing the One True Ergonomic Body Position but should instead rotate through various positions during the day.