A350 dosen't even have engines yet & if Airbus (or Boeing for that matter) are plagued with delays as history has shown you won't see that aircraft for at least another 5 years. Rumours abound on when the company will dispose of the A330's but they still seem to keep em' going. The Boeing fleet will continue to expand to even newer destinations. Its a proven moneymaker and a workhorse. The A380 is always being moved around the network as passenger numbers increase & decrease. It only carries 13 tonnes payload more than a B77W. IMHO the 777 is definitely the fleet to be on for the next 7 years at least.
Current layovers on Boeing are:
Auckland,
Amsterdam,
Birmingham,
Bangkok,
Brisbane,
Guangzhou,
Paris,
Jakarta,
Colombo,
Capetown,
Dhaka,
Moscow,
Dusseldorf,
Entebbe,
Rome,
Frankfurt,
Glasgow,
Sao Paulo,
Geneva,
Hamburg,
Hong Kong,
Houston,
New York,
Johannesburg,
Osaka,
Kuala Lumpur,
Luanda,
Los Angeles,
London(Gatwick)
London(Heathrow),
Lagos,
Manchester,
Melbourne,
Manila,
Mauritius,
Munich,
Nairobi,
Tokyo(Narita)
Perth,
Shanghai,
San Francisco,
Singapore,
Sydney,
Vienna &
Zurich
This doesn't include freighter flying on the B77F