IBM and Centerline launch CityOne at IMPACTCityOne is much like Sim City, only the problems are scarily real, ranging among energy, water, banking, and retail. So, for example, one day you might get hit by a rapid increase in water usage due to population growth—while you're still losing 40% of your water supply to leaky pipes. To fix that problem, you'll have to carefully install a real-time water management system. Or, to encourage growth in small-businesses, you'll have to set up an infrastructure of mobile payments, dynamic invoicing, and micro-lending. Clear your Friday night schedule.