ZWO are also manufacturing a full frame camera based on the Sony IMX455 BSI CMOS sensor.
QHY hasn't announced a price yet, but ZWO are saying their colour version will be $4K and $5K for the Mono version. The prices are revealed in the comments section on their Facebook page.
Delivery times are 3 to 6 months away, waiting on Sony to ramp up their production volumes. ZWO also has to make a 2 inch filter wheel for the mono version.
https://www.facebook.com/ZwoDesignAstronomyCameras
These are the specs of the QHY version so I imagine the ZWO version will be similar.
Pixels: 60mega pixel
Pixel size : 3.76um
ADC: native 16bit
Fullwell: 49ke (196Ke with 2x2 binning) (440Ke with 3x3 binning)
Readout noise about 1 to 2.3 electrons (hi gain / lo gain)
Both monochrome/colour available
On board DDRIII memory : 2GBytes
Interface: USB3.0 + optional Giga Ethernet
Two stage TEC cooling
Electronic Rolling Shutter