After having seen that video I would say only the FlyByWire team has the dedication time and passion to simulate this airplane.
The 777X has the same problem the A350 and the A380 has, it´s systems are so sophisticated so complicated so hypermodern it would take several years to simulate only a few of these cockpit screens and it´s sub-menues and various desktops and pages and functions.
The FlyByWire team will be preoccupied with the A380 for 2-4 more years, and start their new project the A350 afterwards.
So the prognosis of seeing a 777x in Flight Simulator 2024 in the oncoming six years is rather bleak…
(Except Captain Sim 
makes one with default Asobo747 systems on a 2D cockpit and without virtual cockpit and without cabin, so never give up hope!!!)