What would cause you to switch to canon?

I would switch back to Canon for the same reason I just switched to Nikon. Nikon use of the Sony sensor for the D800 is superior in every way for my studio shooting. If Canon were to come out with a superior sensor that had more resolution and produce better files I would once again consider switching back. Nikon's lenses, as far as I'm concerned were better at the focal lengths I needed. As Canon produces more lenses that match high resolution sensors this would also add to my decision. I am not dedicated to one system only to how the camera works as a tool for my business.