Waist size, car size, TV size -- we got rich and everything got big. The average American house in 2004 was about two and a half times as big as the average house in 1950 (from 983 square feet to 2,349). That's not true all over. The Chinese, like most Asians, have stuffed many generations into the same small houses. But now that the Chinese are getting rich, it's likely they'll want to expand. But at least one architect has built a smarter (if extremely quirky) house in Hong Kong. Check ...