CNN has this article, about supersonic flights that would be fast, cheap, and environmentally better. This is 20 years away, but taking off where Concorde left off. Key issue at the moment is that no existing engine technology can withstand the intense heat that the newer engine would generate.
Projected supersonic flying (Mach 2 to Mach 4) requires super-streamlined design, so wide-body jets will go the way of a brontosaurus. But with such short flights, instead of forking over extra money for a business-class lie-flat bed, you can sleep in your own bed, fly to your destination, and then sleep there - no need for airborne sleep.