There has been plenty of talk about a HKG-JFK direct flight. It looks at though we are going to start this route, although only because CO and UA are doing it. The A340-300 will probably be flown on the route in addition to the YVR-JFK flight that currently flies daily. This is because CX888/889 are very popular with the locals in the US and Canada so will likely be continued.
Some flights are very expensive on Cathay, but people are willing to pay, as the load factors on our flights are very high at the moment. As long as there are passengers, the price won't drop. Simple economics really.