"Venice may soon be sharing its 'Floating City' moniker thanks to a research project developing 'amphibian houses' that are designed to float in the event of a flood. The FLOATEC project sees the primary market for the houses as the Netherlands, whose low-lying land makes it particularly susceptible to the effects of rising sea levels. Such housing technology could also allow small island-states in the Indian and Pacific Oceans that are at the risk of disappearing in the next 100 years to maintain their claim to statehood through the use of artificial, floating structures."

Here is another innovation that will be seen more in the future:
http://2ndgreenrevolution.com/2009/05/15/a-carless-city-emerges-outside-freiburg-germany/