I'm surprised at the heat this conversation is generating
I think it is fair to say that Fuji has demonstrated a strong commitment to the X System in terms of continuing to evolve the system, publishing and executing a lens roadmap which keeps adding outstanding lenses, fixing the problems users complain about and giving free firmware upgrades to give these features even two years later (best in the industry on this front). The Fuji system will take all the manual focus capable legacy lenses, too. It also produces such good JPEG files right out of the camera (and allows you to generate them from raw files in camera), significantly speeding workflow to finished images.
Admittedly, 4/3s was mostly abandoned, but the lenses still work reasonably well on some micro4/3s models. There is a full range of compatible lenses, some of which are outstanding.
Sony has indeed been innovative, but buying into their camera and lenses means you have a high probability of being stuck with lenses which are hard to sell as Sony changes direction again and abandons those who bought into the last system. Our local dealer had at least as many Sony lenses in the used case as Nikon or Canon. Given the short time Sony has been out, this is a bad sign. Fuji and micro4/3 lenses don't last in the used case.
I think it is helpful to warn new users that with Sony there is a good chance you will end up with an orphan system in a short time frame. If you are only going to buy one lens or plan to use legacy glass, no problem. If you plan to build a system, think twice.