Looks like a done deal now according to this update. Prices seem a bit steep. New lens series probably downsized to better match the smaller form factor. Wonder still whether compact ILCs(minus prism bump) with honking big sensors aren't in the wings from other makers?
Sony to Debut a New Line of 'Compact' Full-Frame Cameras Starting this Month: Report
The original $1000 price tag where naive/unrealistic to begin with. There is allot of investment, R&D involved in product development, some of the parts are relatively expensive to make and only a certain % of the parts work as they should, there is allot of workers and supplies who needs to get paid, marketing, distributors, resellers and investors that want to make a high profit possible, that is not gonna happen for a $1000 product in a time where camera sales are dropping in drastic rates every year.
The age of cheap new camera is over, the future cheap cameras will be older models with older and cheaper technology.
Personally I would not want a compact full frame and even less so Medium format. The Mirrorless is already nose heavy and unbalanced. You will also run into serious distortion issues if you shrink the lens too much, there is a physical limit for how small you can make these without compromising image quality to much. I travel allot I personally would not find it joyful to lug a MF with me.