A reduction of "brown fat" could make you more resistant to gaining weight and developing diabetes. Apparently, brown fat is what works to keep you warm when it's cold out.
The PUMA, a two-seater Segway, makes short commutes to work more feasible. During the modernization of Europe, people lived in smaller-sized communities as technology increased. I wonder if that'll happen again. Towers keep getting bigger and bigger, and land becomes more and more precious. In a similar vein, the FCC's $7.2 billion plan to expand broadband can serve to pick up the speed of commerce, and expand markets.
Here's a solar-powered city planned for Florida.