"The world's most expensive privately developed city (cost: $35 billion and climbing) is also the flagship of Cisco's Smart + Connected Communities initiative, which some analysts believe will eventually propel the company to an incredible $100 billion in revenue. The instant city was the star of Cisco's pavilion at Expo 2010 in Shanghai this summer, which hosted seemingly every mayor in China. Songdo will be the test bed Cisco's vision of ubiquitious telepresence – several thousand homes are being equipped with interactive, two-way screens. Cisco also signed a deal this fall with the surrounding city of Incheon to wire the stadiums for the Asian Games in 2014."
Other cities on the list include Lavasa, India and Skolkova, Russia.