Well, 42MP at 12 fps with continuous AF is quite impressive. However, I don't like EVFs so this doesn't work for me. And I would not be able to deal with that amount of data but it shows that you can have high speed and high resolution in one package.
Also it does a full sensor read 4K video. This is a first in a 35mm full frame (not super 35) camera as far as I know, or at least in the consumer price class.