Why would anyone choose Norwegian over BA or Virgin?
When I last went to New York, we chose the carrier that allowed half the party to connect in from 3 different regional UK airports and chose our departure time from Heathrow to coincide with the London contingent having time to make Heathrow after work. We also got to choose our return flight to coincide with what we were doing on our last day over in New York.
So why would we choose an airline that'll fly only two or three times a week, rather than once an hour, everyday? It would have to come down to price, and how can a fare subsidised by a premium cabin ever be beaten by an all low cost cabin?
It's a triple fail;
1. No one has made low cost long haul work yet
2. The market has already spoken, overwhelmingly, in favour of LHR to USA
3. The big players have a proven track record of doing everything they can to stop new entrants entering the transatlantic market
What do Norwegian know that we don't?