This is a great list of things that wheelchair users would want in a sci-fi setting. It also mentions some clichés that able bodied authors generally write, as opposed to what they would actually want:
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I think the closest I’ve seen to this is in Heinlein’s The Moon Is a Harsh Mistress, where the protagonist, whose arm was amputated, had a number of different arms that he could use as tools and one “social” arm.
Pretty comprehensive of the possibilities for a book copyrighted in 1966, I think.
How about just, an android body like Data’s, or an android type body assist harness that we can just slip on and off like a shirt and pants?
A wheelchair that instantly appears and catches you if you have a seizure or your legs stop working