93% of Australians live in cities, and they are only going to get more dense. A competition was recently held to find visions of Australia's future, "Designs for Australia's cities 2050+" and many of them are fascinating, such as these towers of stacked suburban houses.
Arup Biometics proposes Ocean City". From Designboom:
The design for 'Island Proposition 2100' [ Scott Lloyd, Aaron Roberts, Katrina Stoll] seeks to capture hyper-connectivity of urban city life. The Ip2100 spine contains a system of hybrid infrastructures, which will link future urban centres and their territories. The spine will transport people and goods using magnetic levitation (maglev) technology, carry energy, water and agriculture goods, convert 'waste' to resources, and provide living, industrial, and commercial spaces along the network. the linear axis will minimize sprawl and concentrate growth along its route, significantly reducing the time and pollution of current travel.
Lots more at Designboom