This is coming. It's more likely to get to the medical help first, though.

A 100 lb nurse needs a bit of assist to move a 300 lb patient out of bed.

Back injuries are terribly common among nurses and orderlies. Due to the increasing number of obese and immobile patients, hospitals are starting to use small cranes to lift them out of bed.

I can see it getting a lot of use in physical therapy before making it to consumers.