Would it really not work to just be able to ask a coworker to help with your desk if you needed that? It seems like even having a small group of volunteers be on-call for such a thing wouldn't be much of a hassle, assuming the right pieces were in place (everything plugs in through 1 power plug, desk and chair only (mount storage to desk etc))
So now you are advocating increasing the social burden for any employee who has an (possibly unknown to you or coworkers) reason for not being able to move their desk.
This is something that it is worth being a little careful about,
It's a cute idea, but making it OSHA-compliant sounds expensive.