Several reactions:
I do consider the X1D a game changer in terms of its fundamental premise: medium format image quality (and sensor) in an exceptionally small form factor. (The Sony A7RII is 625g; the X1D is 725g.)If you don't see that as a breakthrough, then pick up a Phase XF body with an IQ350 back and three LS lenses and take a nice long hike or walk around a city for the day. Then, do the same with the new Hasselblad 30, 45 and 90mm lenses. The XF is a great camera body, but it should have been put on a diet. So, depending upon the lens quality of the new Hasseblad lenses for the X1D, it could be a fantastic landscape/travel camera.
The X1D would have been really ground breaking 2 years ago. Now, less so. The Sony A7RII is already at 42MP, and rumors are that it will go to 72 or 75MP. The siren song of pure MP is powerful. Of course, Sony is aggressively moving away from its initial appeal to me by focusing its high end lenses on big, heavy and fast. I want light and small and can accept slower.
The X1D is the camera that the Leica SL should have been. Leica completely dropped the ball, IMO.
An obvious question is why leaf shutter lenses. Was it just so that the existing HC lenses would be compatible?Of course, you won't have to worry about shutter shock.
Why did Hasselblad not use the same type of EVF that the Leica SL uses, which is supposed to be exceptional. I can't understand that omission in a $9,000 camera body.
The X1D appears to be a beautifully designed camera body. I expect it to be a very functional design rather than being crapped up by a mind numbing menu system and controls like Japanese cameras always seem to be.