I would like to see a mass-produced "mirror-less" (EVF) MF. Perhaps Samsung would make one? Or Sony? Reuse software and components from FF/crop/m43 cameras, bolt on a large cmos/ccd sensor, make it a mass-product, enjoy widespread positive PR. These guys have the software and components and capital to make a "streamlined" MF camera. The only issues are (in my mind):
1. What lense mount (and who gets to monopolize future lense purchases)
2. What sensor (can Sony make as good MF sensors as they currently are making FF? Would they?)
3. Where is the tipping point where such a product would be inexpensive enough while still having desirable quality/features so that it would appeal to a wide customer base, thereby allowing for mass-production?