Panasonic S1H: Why This Camera Is Important and What We Need to Know

The Panasonic S1H has been announced but there is still a lot I want to know including:
– Will the 6K/5.9K be 10-bit 4:2:2? What crop factors will be applied if any?
– Will the HDMI output have any special features?
– Will be see RAW video internally or over HDMI?
– Why is the a vent/fan?
– Will we see something more than 6K?
– Does the S1H have in body stabilization (IBIS)?
– Will the S1H actually be $4000 at launch?