I doubt it.
Most photographers with the money to buy high-end camera gear and lots of lenses are 50+ and set in their ways. Just because an EVF and no mirror slap results in faster cameras, bigger VFs (on APS) and sharper images doesn't mean that traditionalists are interested in buying such gear.
I doubt that, though I don't have any proof one way or another. If you'd said, "Most casual
photographers with the money to buy high end camera gear..." I would have agreed. But, as many people have pointed out, even a small new car now costs $20,000, and almost everybody has a car. In that context, $3,000 for one of the best 35mm cameras on earth (D800) doesn't seem so much, especially if it's central to the way you live your life.
SLR's are essentially finished,.....they will always exist in a minority class like traction engines and brass bands, but their total grip is gone now for the simple reason that it's much more expensive to make a moving mirror than it is to make an EVF.
I think you may ultimately be correct, but not for a couple of decades. I have three EVF cameras, and two DSLRs, and the thing is, the EVFs have to be very much faster, and very much better in terms of visual quality. They come nowhere near the quality of DSLRs. Not even close. And making them that much better will not be cheap. Although, the Fuji hybrid concept is interesting. I once had a couple of Leicas -- an M7 and an M8 -- and now am down to an M7 and one lens, because the viewfinder's focusing mechanism is essentially no good, when compared to modern viewfinders. But I did like the fact that I could see "around" the frame, and that's why the hybrid is interesting.
I held an X100 in my hands for the first time on Wednesday, and guess what -- I didn't like it. I started my serious photographic life in the 60s with a Pentax Spotmatic, and have had F3s, F4s and F5s, and a D1x, a D2x and a D3. IMHO, every one of them was better than the previous model, and all of them were better than Leicas, in the sense of being more functional and reliably producing images that were of good technical quality. My problem with the X100 is that it took me back to the bad old days of poor ergonomics, small buttons, etc. I even didn't like the left-side viewfinder, but that may be because I'm so used to the centered viewfinders on my regular cameras (a user issue, rather than a camera issue.)