Not really techy but, inspired by http://www.youtube.com/watch?v=f-iFJ3ncIDo, I've always thought it would be interesting to suspend beds, tables and storage to the ceiling and then have a (rope+pullyy) system to only put the furniture in a room that you are actually using; freeing up the other space to walk/work/lie down. Plus it's probably real easy to keep clean.
This title has a buzzword for pretty much everyone who ever clicked on anything on HN.