But even then, ignore Linux for the moment, and just pretend I said Mac OS X instead. My point definitely applies there even with the pre-requisite you have for running Maya and Photoshop.
However, you're right that for some members of the asset pipeline, they may continue to use Windows. But for the developer who is debugging in-engine scripts and/or engine problems, being able to build and debug on the same platform would be a huge win.
My guess is that if you can get the editor running on Linux, you can also have it on OS X and vice-versa.
