"Otherwise, even if that 36MP BSI sensor in APSc becomes reality, I'd not expect FF- like images from it. It will have the different look of a smaller sensor and according lenses. BTW, 36MP will put huge strain on existing lenses, specially those designed for FF. 36MP scaled up to FF would be 84MP (!!!). Not sure how many lenses have such resolving power, specially when wider open. Resolution will certainly rise with such a sensor, but not in a linear way, the curve will become flatter."
Depends on what you shoot, with what lenses, for what purpose, IMO.
For instance: At base ISO, stopped down to f8 for depth of field and resolution, I found that cityscape files from my 24MP NEX-7 with a Sigma Art 60mm were hard to distinguish in IQ from files shot with a very sharp 90mm Tamron macro on a 24MP A7 at f8 (or at f11 for more similar dof). Other photographers have found the same thing with other lens combinations. If I was mainly trying to get certain bokeh effects, or lowest possible dof, or absolute best high ISO performance, there is going to be some difference between FF and APSC sensors of the same generation. But not that much. Maybe a half stop of ISO at most light levels; plenty of focus separation available for my usual purposes.
I imagine that if we get a latest-generation APSC Sony sensor, at 36MP, it will probably be considerably better than the NEX-7 in terms of overall image quality. Better, in fact, than an A7. And, I expect that the Zony and Batis primes will be fine on high density sensors, whether APSC or FF. Same for the better FE G lenses and the 28mm. They are really good all around, and remarkably sharp in the center region. I think these new lenses are being designed for future bodies well beyond 42MP. But, maybe we'll get to find out one way or another!