The 787 is a remarkable aircraft. All electric EVERYTHING. I think each generator will provide 200 kVa (two per engine, and maybe two on the APU), more than an entire 727!!! IIRC from the ASTW article a few months back, one generator will provide plenty of power for its systems in an emergency after shedding non-essential stuff.
Composities aren't as easy as metal to repair, but after watching Cirrus engineers do their stuff with a damaged SR22, I'm fully confident Boeing will have MRO procedures down pat with their airframe.
Still waiting on that Boeing KC-767 (777?) replacement for the KC-135...