They have it all wrong. In 15 years, the pinnacle of commercial airplanes won't be shiny, fast and high tech. They will be more like buses or trains: slow, boring, reliable and affordable.
They're already slow, boring and reliable. Where I disagree is that I don't see them getting a whole lot more affordable in 15 years. Fuel and maintenance costs should continue to drop as more old planes are replaced with current and upcoming models but ticket prices have only gone up. People will continue to pay high prices for air travel unless ground travel suddenly becomes a whole lot quicker and we build highways and railroads over large bodies of water. We all seem to hate airlines, but what are you going to do, go Greyhound? Yeah, right. Air travel will continue to be both expensive and popular for the foreseeable future, especially but not only in America. Not every place has a rail system like Western Europe, nor is as compact.