I see a lot of movement away from both DigiBack AND SLR format cams now that we have viable mirrorless alternatives. Mirrorless is a smaller footprint and in MF territory that can be a significant benefit in itself; add to that the fact a plethora of alt-manufactured lenses can be adapted to them and you have a near digital Nirvana. Even Leica seems to be losing ground to mirrorless MF and they held their niche for quite a few years. Finally, you have quality FF digital now up in the 50MP territory, and with some newly designed lenses for those platforms, IQ has overlapped into entry-level MF territory at a fraction of the cost, and still smaller footprints. Hard to overlook that...
I do think the highest MP and/or specialized digibacks will remain in the tech-cam scene, but that market is specialized and requires some added dedication to the capture process -- it is the contemporary version of the past large-format-film/view-camera crowd...