Therefore, would a fantasy rpg (i.e. warhammer 4th ed) based on the SW system benefit from its popularity? will it drag some of the SW fans to it? If the answers are a Yes, then a Warhammer 4th edition with an evolved SW system will also be a possibility, it probably won't please the actual fans, but a possibility nonetheless. I say "evolved" if only because the SW system, as it is, it is not made to be played in a context where hand to hand combat is very relevant.
The hand-to-hand point is a good one, I would like to see a little more variation in what you can do there, perhaps through opposed rolls or other strike or defensive options. SW is primarily a ranged weapon combat game (though I'm hoping Force and Destiny will maybe offer better dueling with the lightsaber rules). But I do view the SW game as a whole as a revolution. It's simple, no muss no fuss, and gets the job done. When I bought 3E I could see the revolution coming, but it wasn't quite there yet.
Maybe FFG should go GURPS-like with it: make a base/core that uses the same dice mechanic to resolve conflict, with different genres getting different skill lists, equipment, careers, talent trees, slight tweaks to certain mechanics, etc. Custom dice sets for each genre would complete the package.