JV, Kaplan - will process the shot with the H4x and the HCD 28mm and post on a new topic to address the technical data, but my initial reaction was wow! very cool to have wide angle HC with a non-Hasselblad back (didn't get to test film!) Would also be trick to shoot with the 35-90 Zoom, too.
Not sure if anyone has seen the 7-minute video posted by Alex Koloskov where he specifically tested for the benefits of TruFocus using the H4x with the P25+, but a quick Google search will get you to the right place.
So the net is if you want to shoot with the technology of the H4: 1.) bright LED autofocus assist 2.) TruFocus for camera movement retaining original plane of focus, and 3.) access two valuable focal length lenses, then you might want to get some demo time with the H4x. That's where the reality sets in...absent of opinion or argument.
Do you guys have a local Hassy dealer you can visit?