After witnessing my father's deafness in one instance to my mother's calling of his name from several large rooms away, I remarked to O., "When we get old, let's live in a little house so that we never have to shout for each other."
"How about a dome house?" O. suggested.
I had never heard of such a thing in real life. O. described to me a geodesic dome house with a wooden frame, but he was fuzzy on the details. An internet search was soon mounted, quickly leading us to a website for an entirely different sort of dome house: one manufactured by a Japanese company and made from "the fourth generation building material: expanded polystyrene!" You can watch the promo videos, hilariously dubbed in a lovely Australian accent, on the company's website, but a better viewing experience can be had courtesy of Youtube. Embedded below:
I doubt these houses will catch on in the U.S., but I can imagine them doing well in Japan, as illustrated in the 480 dome village in the video. Having lived in Japan, I recognize a thousand subtle Japanese influences and assumptions in the design--most obviously, the compactness of it. What American would call a 44 sq. meter dome "really spacious"? These dome houses made me nostalgic for the world of my childhood, a vaguely remembered Japan.
Anyway, I seriously am interested in living in a dome house someday. This looks way more convenient than a treehouse, and almost as cool.