It may a bit upset rumor but it’s right though that the upcoming camera of Fuji will not have 4K video recording, because the reason is “the sensor itself should have much faster reading speed”.
May be they didn’t prepare the 4K technology yet for X-pro2 camera, which will be announced on January 15th.
Have a look at the rumored specifications of Fujifilm X-pro2.
1/8000 of a second mechanical shutter speed
– Joystick for quick AF-point slection
– Exposure Compensation Dial with “C” function for exp.comp from +5 to -5)
– Combined ISO/Shutter dial, with little window on shutter dial to show ISO value
– weather sealed (TS)
– No 4K
– Faster Processor EXR III
– No Tilt Screen