I don't think FSX can ever be converted for the XBox 360 for one reason: File Size! FSX Deluxe is about roughly 12Gigabytes uncompressed; and the fact that FSX comes in two DVDs just for installation tells me that not everyone is gonna be happy about swapping DVDs in the XBox 360 just when they're about to go into final approache. On top of that, you can imagine the loading time put into uncompressing the files from the DVDs and then loading them once more for playing. FSX is slow enough when it comes to loading the flight on a PC; but on a X360, that's just adding salt to the wound.

So, unless someone in this planet manages to invent a DVD that can hold 12-14 Gigabytes of UNcompressed FSX Deluxe files without having to create a 2-disc package for the X360, I'll just stick with the PC version.
By the way, have any of you noticed that the scenery in Ace Combat 6 [as well as the light blooms] appears to resemble more like FSX scenery? Look at the water, the terrain, the shore lines, etc. Very uncanny if you ask me. Coinsidence? I don't know.
