Latest rumor says that BOTH X100s and X20 will feature a focus peaking, which would be very nice! And both the X100s and X20 will feature hybrid (contrast and phase detection AF) – not sure if ths is going to be feasible on the X20. X100s’s EVF will be much improved as well. And lastly, X20 (as well as X100s) will also receive a sensor based on X-Trans technology! This should make the X20 one very competitive camera in this sector, which is already crowded with excellent models like Sony RX100, Panasonic LX7, Nikon P7700, and Canon G15, and its own X10.
Release dates for both are currently set to Feb 16.