Well, it obviously wouldn't be a shrinkwrapped game you'd get at EB -- Sony has seen to this w/ their US$10000 per developer licenses (yes, that's the correct number of zeros). It would have to be for folks who have the ability to download and run games over the network adapter (or USB port via
Naplink)
And if it's connected to the net, there's no reason why mods, etc. couldn't be available, there are precedents for that too.
But the barrier for entry is pretty high -- someone would
really want to play this in order for it to them to be able to load it. That's the good news/bad news side of console game development -- the shrinkwrapped stuff is easy (no worrying about the right driver version, right video card, sufficient memory, etc.); it's essentially targetted at the lowest common denominator. But it's not at the point where Joe Gamer can just download a game from the net and start playing it.
And the UI would suffer dramatically -- only 12 buttons plus two analog thumbsticks is a much leaner input device than FS was designed to use, so something would have to give. The obvious choices would be messaging and/or ETS, but this would require a lot of changes to the game engine to make certain ship/weapon combos playable. And removing either if these would affect the playability of all the missions as they're designed now...
Bottom line: it would require almost a complete rewrite. Not that this is a Bad Thing

but it sure would be a lot of work.
For now, it's purely idle speculation. I was just wondering what the reaction would be.