It is hard to know any "full" story today...
Years ago aviation industry was very openly communicating about all their innovations. Read some old Aviation Week or Flight International, it reads like a scientific publication.
Now all you get to know about the 777X ist that it will be a great aircraft... And the wings will flex a lot according to their nice pictures.
And yes, it will most probably have folding wintips, just like the very first 777 was intending to have, until the operators said "no".
Liebherr will do the system components (they do airbus high lift components and Enbraer, Bombardier, Airbus Landing gears so far)