The nice thing about a touch screen is you do not have to touch it, use the input controls. But if you are in smooth air it might be easier to use the touch option.
On Monday, September 25, 2017 at 9:08:11 AM UTC-7, jfitch wrote:

Modern touchscreens do not affect screen brightness. Older/cheaper resistive technology used in PDAs such as the Oudie 2 had a separate overlay for the touchscreen with an air gap. All modern smartphones have in-panel capacitive touch sensors, it is built into the display glass as an integral part.. I do not know what Air uses on their L display (the M is not touch sensitive). A touch screen does not work as well with an in-panel display in my opinion, because touch accuracy is required at arm's length. If the display is mounted on a stalk or RAM type mount, the display can be grasped by the thumb and 4th & 5th finger, and accurate touches (including multitouches) used even in rough air because your hand is anchored to the display.