Many thanks for that, very nice to hear some hands on feedback, it is all disappointingly positive so my next couple of years purchasing plans might be rethought! 100MP and an extra 2 stops of DR sound pretty future proof to me, the fact that I get a weight saving over the 1DX MkII as well is a bonus!
As for your PS file size, why not save as a TIFF or PSB instead of the capped PSD?
So far Capture One does not support PSB when sending files for editing to PS, only PSD and TIFF, and I prefer native PSD, and keeping file size below 2Gb by merging layers when needed while editing. Whatever possible I am trying to do in C1 before sending to PS, C1 supporst up to 16 ayers, a lot of things that had to be done in PS before now could be done in C1.
In general C1 and PS are perfectly integrated now, no difference compared to LR+PS workflow.
I stopped using LR almost half a year ago and all is so much faster and easier now with C1.
One good thing is that C1 fully supports GFX100 film profiles, one which is selected in camera also used by C1 though there is a small caveat - C1 shows profile as auto instead of profile name wich is actually used, it is already reported by some other gfx user as bug to C1 support. In my first portrait photosession with GFX100 I had practically nothing to adjust in C1 - everyting was perfect just out of the camera.
JPEG files are excellent as well and could be easily transferred to the phone.
Some RAW editing and convertiong to JPEG also could be done in camera.
There are some other very handy features in the camera that make it pleasure to use.
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Some addition - DXO PhotoLab is planning to add support for GFX100 next month, will be interesting to to how that will further improve image quality, especially result of PrimeNR use for high ISO images.