I remember watching CNN's coverage on that first scheduled 777 flight from LHR to IAD. CNN coverage focused on 777 was the first fly-by-wire plane Boeing has ever built and it was the first new Boeing model almost 15 years.
I believe my first 777 flight was in July 1996 on IAD-LHR.
IIRC, N777UA was also the first 777 to receive the rising blue livery back in 2006.