Will Micro Apartments Go Macro?, article, pictures.
I think my fascination with these things is an outlier of my general fetish for efficiency.
Besides that, it's a hugely needed solution, in almost all cities in the world, people have problems finding decent, affordable apartments. (And this is after the housing bubble supposedly burst. I think it only burst half-way, if that.) It's just ridiculous that people are using over half their earnings just to have a roof over their head.