The 777-200LR is a great jet,. But Qantas has said (and everyone keeps ignoring them) that it is inadequate for commercial operations non-stop on the Sydney-London route either way.
It will happen one day, maybe within 10 years.
But the fact that SQ
has said in The Straits Times it is not after more ultra long range jets is a note of warning. What that story means is that with five A345s doing the two ultra long range routes it wants already to Newark and Los Angeles, there just isn't the demand for any more.
Pity the 777-200LR wasn't up to the mark when they placed the Airbus order, but that's life.
We won't get any super long range jets until there is serious demand in the market place.