Pricing of sensors rarely go public these days. The volume pricing for manufacturers of the KAF-50100 (which is in for example Hasselblad CFV-50) that was announced in 2008 was $3500, the CFV-50 back costs today $17,000 and is actually cheaper than for example P45+ which is at $20,000.
This suggests to me that there indeed is room to make a more cost efficient product that could sell in much larger volumes in for example the growing amateur tech camera market. I think the "right" price for a back similar to CFV-50 would be $8K, to be matched with Cambo, Arca-Swiss, Alpa, Linhof systems costing $12K - $15K (or much cheaper systems from for example Silvestri, $6K you can get something decent). You would then get a new complete system for $14K - $20K that already on paper wins the psychologically important megapixel battle with the DSLR, and has this all-different shooting experience which suits the among amateurs super-popular genre landscape photography.
There is already today a back that new costs $8K, the 22 megapixel Leaf Aptus-II 5, which is a great back but 22 megapixel is not sexy enough these days to make it a success for this application, and few even knows that it exists and combines well with tech cameras -- marketing is lacking. What you see marketed is the flagship products, marketed towards pro users, and very rarely you see marketing targeted specifically for tech camera usage. It's more like "here's our great 645 body which is great for everything from fashion to landscape, and by the way you can smack it on a view camera or something too"
As it seems it would require new thinking though and therefore a different company than the established players.
1) make a product based on a standard sensor such as KAF-50100 or Dalsa FTF-6080C (user-changable mount of course, perhaps with builtin shimming)
2) collaborate closely with tech camera makers, and make it show
3) make marketing material focusing primarily on usage with tech cameras for landscape photography, and typical pro usage (architecture, product) secondary, also show how it can be used with vintage cameras (RZ, Hasselblad V etc)
4) make it easy and accessible for the customer to buy things, employ direct sales via the web, make attractive tech camera bundles
5) have popular photo magazines/sites review the system, make lots of noise having a new "affordable" MF system that serious amateurs can afford. Meet DSLR comparison head-on with no-bullshit strategy. Focus on the shooting experience just as much or more than image quality.
6) watch you pass 10,000 sold units within the first year and cause tech cam makers to have long waiting lists on their gear ;-)