Here's a new Virtual Earth video that highlights what we have been calling the "version 2" enhanced 3D cities. Among other enhancements, these newest cities are denser (more buildings), have better, more detailed photo-realistic texturing, and feature trees.
The video also features some pretty cool Virtual Earth bird's eye imagery (oblique, 45 degree aerial views). Take a look:
Video: Microsoft Virtual Earth - Spring 2008 Release