So here's why Fish hating the dual screens doesn't make sense.
Sure, many things that the second screen is used for are not 100% necessary. They can be done with one screen, true. But so what? It doesn't detract from anything. There are no real negatives. There's no reason to complain about something that doesn't affect you negatively. That's why he doesn't make any sense and is just being a punk. He's complaining about something that is either positive or neutral.
That being said, I do think the screens add to the games simply because User Interface is a part of game design. UI is cleaner and nicer with a second screen, and adding touch to that makes it even better.
Look at FE: Awakening. There's so many things to keep track of that they couldn't even fit all of it on two screens. You need three, lol. But having two screens instead of one gives me less menus to dig through and more options. I can look at the battlefield while looking at menus and don't have to keep going into the menu, then backing out, then going in, etc.
It's just plain handy.