This is a highly interesting Canon 5DsR vs PhaseOne IQ250 vs Hasselblad X1D comparison video. The author writes:

Here’s our test of three different 50MP camera systems. We used a Canon 5DsR with a 70-200 f/2.8 L II, a PhaseOne IQ250 with a Schneider-Kreuznach 110 f/2.8, and the Hasselblad X1D with the 90mm f/3.2. We looked at sharpness, highlight and shadow recovery, and skin colours. The test does not claim to be exhaustive or perfect, but we hope you find it interesting.

A couple of findings from the test:

Skin tones are way better on the two medium format cameras
The 90mm f/3.2 lens is very shapr and beats the rest of the tested lenses when it comes to corner sharpness.

X1D on preorder at BHphoto (Click here).

Image above: The X1D fist perfectly inside the Camslinger bag (Just to show how small it is!).

Bloomberg posted a full X1D review written by Photographer Keith E. Morrison:

For your general photo enthusiast, the price tag still may put the camera out of reach. But for any pro who shoots an array of subject matter, this may be a worthy long-term investment to make. My Mamiya 7 could officially have some competition for the title of favorite camera if AF points were expanded a bit and the battery life were extended. The camera is an extremely lightweight and versatile piece of tech that further challenges the idea of where and when digital medium format should be used.

X1D on preorder at BHphoto (Click here). Streetomatic bag at Camslinger.