Once again it's a Boeing-Airbus showdown. Airbus stealing the headlines with a major product launch at this year's Farnborough Air Show. The European planemaker is unveiling plans for a revamp of its top-selling A330 jet. That will go head-to-head with Boeing's own 787 Dreamliner. The U.S. firm is undaunted though. Boeing vice president Randy Tinseth says Airbus's hopes to sell a thousand of the new jets look optimistic.