Along the lines of future design possibilities, as mentioned here a few days ago, take a look at this "Personal Mobility Unit" of tomorrow.
Toyota says their "i-unit" is intended to "attain a greater balance of meeting individuals' wishes to enjoy freedom of movement, harmony with society, and harmony with the Earth’s natural environment." Sounds good, even if it doesn't fly.
Of course, this is just one idea, and robust molecular manufacturing will make even more radical designs a practical possibility. People sometimes ask: If this is the Future, where's my flying car? Flying cars may or may not prove to be a sound idea, but other changes coming in the next decade or two are likely to be far more startling and transformative than we have yet imagined.