I work with several people who have various disabilities and need adapted equipment to be able to use technology. Additionally, my wife has a disability and has trouble using a standard keyboard and mouse. Right now, the only way to find adapted equipment is to go on line and search, or be in contact with an occupational therapist or disabilty services provider. There are lots of people for whom a non-standard mouse or keyboard or some other minor adaptation would make their technology experience much easier or enjoyable, but who don't know where to go to find the right stuff.
I think that adaptable or ergonomic equipment needs to go mainstream instead of having to be a medical issue. I think Best Buy could be a leader in supplying that market by having products in-store that people could get hands-on rather than having to look at pictures and descriptions on a browser. I don't think it would take a lot of floor space to have an area for accessibility, and would certainly benefit a lot of people, who don't want to be branded disabled, but have a need for equipment that isn't the standard off-the-shelf stuff.