EOS is apparently the best of the LON-NYC carriers at the moment. MaxJet is also in there, and SilverJet is starting up within the next 9 months (and looks set to be considerably cheaper - £999 instead of £2,000+ - with a better seat than the others).
The thing about all of these carriers is that you pay a reduced business class fare. The American legacy carriers are still offering business class travel (admittedly not so cosseted as this EOS report indicates) for those who can upgrade from coach using miles or systemwides; and this means that BA and VS are still having to work hard. EOS is very good, but at a price. So there is still competition.....
Anyone remember People's Express and their business fares?