Well, I'm quite impressed by some of the videos being created in FSX with TileProxy serving as the terrain. If you visit AVSim you can catch up with all the latest developments in the TileProxy Project forum. Beta 5 version was released on June 15/07. As more individuals tweak their settings, some beautiful landscapes are being captured in screenshots and videos. Try this one over the Grand Canyon:
http://www.edtruthan.com/tileproxy/clips/TPB5_GrandCanyon.wmv
Check out these 2 screenshots (courtesy of Ed Truthan) over Marble Canyon. Arizona. And remember, these shots are heavily compressed! More details in their beauty can be seen at AVSIM.
Who would have ever imagined it would get this real, this soon?