Upload & Sell: On
I do get what you're saying, but full frame is fairly mandatory for a pro working for hire. We can debate the merits of smaller formats, and it's true that a pro could get great results out of M4/3, as it seems you do if you sell prints. But clients paying good money will not understand, and will expect you to have a "professional" camera.
Also, as I understand it, the E-M1 also had trouble with silent shutter under CFL type lights etc. which stopped a lot of potential uses and the banding ruins the shots. If Sony delivers with the first sensor that can primarily use electronic shutter, and be shot silently in all lighting conditions, and full frame, it really is revolutionary. It will be a significantly better choice for any situation the sound of the mirror slap or shutter is a problem.
But, we're also dealing with marketing hyperbole here, and we always will. Every new release is game changing, revolutionary, best ever, fastest... And all releases and brands do it. No one is launching a new product saying, yea, it's pretty good but not really different than those other three...