gnarayan
Gautham Narayan
No-one else seems to have thought of this one, which certainly seems unanswerable at the moment. But then, when it's pie-in-the-sky, you can have any flavour you want.
Not really an issue in use. For EVF substitute live view. In situations I really want to stop down and use live view (mostly very awkward angles) there is enough light (or I'd not be stopping down to begin with really) and if its really dark, then I'd not want to stop down a heck of a lot anyway.
Most live view implementations I've seen just go black and white to keep the grain down and the refresh rate high in really poor light situations.
It is worth pointing out that ISO 3200 just ain't that hard these days for any CMOS sensor in a DSLR and these EVF cameras do use CMOS sensors. In real darkness (long exposure night photography for instance) you can do things with the EVF/live view that just aren't possible with either an SLR or an RF viewfinder. If you want to focus accurately on black cats in coal mines at f1.2 then you are going to be using the noisy, grainy, LCD/EVF. May not be pretty but it can do the job. May not be useful to everyone but most people couldn't set the clock let alone use half the functions on their VCRs back in the day.
And of course you get to actually see the DoF you capture through the lens with these EVF bodies (which isn't even really true in an AF SLR view finder).
I think it is just a matter of time before a 35mm frame size EVF camera, but I doubt it'll be Leica and I doubt most die hard RF users will be interested. A camera like that would be an interesting additional market for used Leica lenses though if they can work out the back focal distances - the number of people using the Panasonic or Olympus cameras with lenses like the 40 Nokton is striking.
It is certainly true that pie-in-the-sky is always tasty. But it also seems to me, that people who are set in their ways are generally not keen on any change, regardless of the consequences of that change and have a tendency to favour arguments that support their view, regardless of whether they are sound or not.