That's going to depend pretty heavily on what you're doing with that computer on your face.
Ergo problems typically come up when you're assuming the same posture for long periods. If there are no other constraints to lock you in (e.g. desk and monitor), then I expect there will be much more moving around (perhaps even explicitly encouraged by the OS).
Whether this offsets the weight-on-head thing... time will tell. Whatever the problems will be, they'll be different problems.
That's going to depend pretty heavily on what you're doing with that computer on your face.
Ergo problems typically come up when you're assuming the same posture for long periods. If there are no other constraints to lock you in (e.g. desk and monitor), then I expect there will be much more moving around (perhaps even explicitly encouraged by the OS).
Whether this offsets the weight-on-head thing... time will tell. Whatever the problems will be, they'll be different problems.