The H1/H2 firmware update allows battery status check for Li-Ion rechargeable grips (how much is left on this battery?) by holding the backlit button; additional mirror delay for hand-holding at slow shutter speeds while tracking the target, and HTS compatibility (provides readouts on the top LCD panel of the HTS coordinates so you can verify the digital position of the tilt/shift independent of the side markings.)
I have experienced positive feedback from Hasselblad, Phase, and Leaf shooters using the HTS 1.5 lens adaptor, if you have not rented or tried one yet, you should race to your nearest Hasselblad reseller/rental house and examine for yourself. OK, maybe not race, but walk quickly.
As mentioned in the above posts, we make a concerted effort to update any H-system firmware while in the field to be sure that Hasselblad camera owners are getting the max out of their system, especially when it can do more today than when originally purchased. Takes about 3 minutes. Happy faces.
Hasselblad conspiracy theorists must contend with (yet) another triumph of fact over fiction...
John