I picture the lower cupboards on a base that sinks into the floor as needed to lower the counter top, upper cabinets on a track that come down as you need to reach something or see what's stored there. Obviously above-the-fridge space isn't going to move but all of the major counters and cabinets ought to. I don't know about the sink--I can't picture what's possible in terms of the pipes. Perhaps the sink would have to be a stand-alone exception and simply a second, lower sink would be available for wheelchair/little people use. Stoves might also be on a platform that can rise or sink as needed.
I doubt I could afford such a system even if I had a house to put it in but new homes should just be built this way. No one knows whether they will be in a wheelchair or develop a painful back problem. Similarly, homes should just come with ramps rather than steps, and wide doorways should be the norm. Then no one has to scramble to adjust to a future disability. When my son was in a wheelchair we had to move to a different apartment entirely!
And hey, if you make some money and want to kick me a donation, the paypal button is to the right of this post. :)
ETA: I used to just squat for lower shelves but then I fucked up my knee. Oh and while I'm dreaming, all cabinets should have lights you can turn on--especially lower ones.
Some of what I'm talking about but only marketed/for wheelchair users. I'd think bigger than that! It should be part of home construction, especially homes where different-sized people are expected to use the kitchen regularly.