Preview of the CityEngine:
Future City Generation:
Transformations in Architectural Design
The software is aimed at the efficient creation of virtual 3D worlds and digital sets with targeted markets including interactive and filmed entertainment, architecture, simulation, archaeology and the 3D Internet.
Hopefully we will have a 'hands on' view of the software soon, it looks like being one the most exciting releases for city building for some time.
See http://www.procedural.com/ for full details.