But a FX DSLR could still be build smaller, with a size in the D90 area
Yes. This year they could do it. And this year I could buy it.
EVF's will eventually match optical viewfinders. It's just a matter of time.
I'll be an early adopter. I think it's got huge potential benefits, especially if they ever open up the hardware for 3rd party open source firmware. You give smart people some gadgets and a way to interface with them and it's amazing what they come up with.
I prefer the thicker bodies, too, MB and Niko.