Huh, well, more are interested in this one, RJ.
Remember the years a while back that I incessantly posted architecture and land use threads? A lot of them flopped, but some caught on for a bit. I may start that again, not as incessantly, as I follow the same source, ArchNewsNow.com, plus other stuff I run across on news sites.
My husband and I lived in a small california bungalow for, um, 22 years - it was, for twenty of those, something like 575 sq ft., and got smaller when we remodelled since I knocked off the tack-on caboose room ( max 20 sq. ft) to put up an overhead trellis and bench.
An architect friend in LA designed some prototype 400 sq. foot homes - haven't talked to him lately to find out if they ever "flew".
Interesting point about the nature of kitchens in the coming years. I think I would hedge my bets in a situation like yours - have some with larger kitchen features and some with smaller as you mentioned.
edit to add, our kitchen then was 8 x 12 at most, so.. 96 sq. ft. That had a small stove and washer and dryer, and the fridge went into the room next to it that I used for a studio.. really a small room that was sort of a big hallway to the back door.