I just came across this: LargeSense Large Format Digital Backs and Cameras
A tiny tiny company making a large format digital back.
Not for sale just yet, but hopefully coming out during this year a 9x11" digital back. CMOS, live view, monochrome. Fat pixels 75um meaning only 12 megapixels in total. Base ISO is 2100(!) so you probably need an ND filter. No LCD on the back, instead you stream the live view to your phone/tablet/PC via Wifi.
Price? It's expected to be $100k.
Extremely niche of course, but still super cool. I hope they make it to production and sell a few.
It's not the fist large digital back, Mitch Feinberg made a couple 8x10" 10 megapixel backs in 2011, not really for production images but to replace polaroids during setup. Back then he said that if they would put the backs into production they would cost "low six figures". $100k is the lowest six figures you can get, so I guess it's okay :-)