If they had the computing power that existed even 10 years ago this would be a viable machine, though I think that it would work as purely mechanical if the operator were in a crawling position, rather than seated, as it would put their legs and arms a position closer to that of the limbs they are operating. Since the feet are just blocks, the operator doesn't really need hands for operation, which could leave them able to control other aspects, such as loads or weapons.

Neil