Earlier quoted context omitted.
I don't understand how anyone could think dual screen is a gimmick that had a DS. There were a lot of games that put those two screens to good use. I am serious.
Consider this: To gain any information from a screen, you must actually look at it. You can only look at one screen at a time. The entire functionality of a second screen can be replaced with a single button: While that button is pressed, the screen shows whatever else it needs to show. It is true that pressing a button is ever so slightly slower than moving your eyes. But considering all the benefits from saving a w…
If your one-and-only screen is touch, you have to lift your arms up away from your buttons to press anything. No matter how much of an impost it is to have to look down a little, I'd say it's still less than having to lift your hand away from the buttons into your eyeline.