I'm partly being lazy not to just try it, but mostly being conservative about consequences I might not know about until later.
Do you check your IDEA project and module files into source control? Do they work correctly on a different machine with a different topology, or in a different file system location on the same box?
So far, I'm the only one here using IDEA, but it'd still be useful to check out source to a new location (different environments), and have my project, modules, favorites, etc already set up. Once other people are using it, it might get either more valuable, or harder to manage, or both.