No, Willy, it doesn't. Here are the few default scenery improvements over FS2004:
- 38 meter mesh for the USA
- 76 meter mesh for the Canada, Europe, Australia, New Zealand and Japan
- Improved shore lines and roads for the USA, Canada, OZ, Japan and Western Europe
- The rest of the World has the same vector data as it was in the FS2004, as well as the mesh, I think.
- The default landclass has the same level of "accuracy" (or even worse in some parts of the World - Some parts of the Italy are covered with desert). However, FSX has more climate zones than the FS2004.