Interesting quote from ANA's President:
The airline plans to use the smaller passenger capacity and long legs of the 787 to provide customers more scheduled flights than can be offered using larger aircraft such as the 747-400. Focus will also remain on using the fleet to offer more mid-range international flights, versus domestic routes. The airline sees the potential for the 787 in a 200-seat configuration to offer operating costs 50 percent lower than those of a Boeing 747-400.