I've been looking for something like this, well sorta.
Many 'family' cars now come with the option of headrest ipad mounts for rear seat entertainment. This is great, but what about when my kids want to watch the same movie? Showing the same movie at the same exact time on two different ipads would be solve a tremendous pain point for me, and possible lots of other parents!
Radiologist here. We regularly image patients in 3T MRI scanners. As long as they don't have certain metal surgical implants, a pacemaker, or metallic foreign bodies, there is no problem.