According to the feature, picked over by NeoGaf , the next SimCity will be set 20 years after previous entries and feature organic cities that won't have to stick to America's regimented block system. There's also mention of global leaderboards to celebrate the most efficient player metropolis and a new graphics engine to power everything. It's also supposedly due out next year.
It's all unconfirmed at the moment, but the timing is good. Maxis are due to announce a new game at GDC next week. Hopefully it'll turn out to be the SimCity that fans have been waiting for.