The Boeing 777 is a full flyby wire airplane. but is very different from the 330 system.
the 777 in normal fbw will have all the control laws . if problems happen the computers will go into other laws. but the 777 you can disconnect the primary flight control computers and goto direct law witch...
As an airline mechanic i need to point out a few misconceptions you have.
first the 7e7 witch is now the 787 will have hydraulic systems three of them in fact . it will have a very limited pneumatic system witch one is pressurizing the hydraulic reservoir. the other engine cowl ice protection...