Hopefully in FSX they will make the ATC more realistic in that ATC will separate traffic enroute. I have been run over by other airplanes enroute and it takes forever for AI traffic to clear the runway. To add more AI traffic I use Just Flight, Traffic 2004. It makes FS9 more realistic especially at busy airports, LAX, DFW, ORD, SFO. When FSX comes out I know what I will be looking for at Xmas.