Palo

It's difficult for people "to imagine how the future may be different and the technologies that might make it different," said Jane McGonigal, director of game research and development at the Institute for the Future in Palo Alto, California.

Mark Grimmette and Brian Martin could not have come from more different backgrounds. Grimmette is from Michigan, where there is heavy ice and snowfall and he helped build a luge track when he was 14. Martin is from Palo Alto California, where the average temperature is between 10 and 20 degrees Celsius and there is no snowfall.