touchscreen

From the software side, any portion of each system's interface that overlaps at the touchscreen cannot be isolated.

On top of that, if the touchscreen is reprogrammable, then it can be attacked directly and touchscreens are commodity devices not normally considered part of the security infrastructure.

A touchscreen is the last thing I want on a car.

A pure touchscreen game is always limited in ways that a D-pad and buttons are not.

Correcting a sentence or copying/pasting a series of sentences is much easier with a mouse/keyboard combo than a touchscreen/voice combo.

Managing all my car settings requires a touchscreen -- should I really have two touch screens for this?

Two systems that accept input from the same touchscreen can't be isolated in hardware.

Yes, you would have to live without single uber-control touchscreen, but it's not really that big of a limitation: you simply need separate controls for low-importance and high-importance things.

While I think a touchscreen would be really welcome, still, Pebble seems to be the only wearables company that wants to make something useful instead of shiny.

There are no accelerator/steering/braking controls on the touchscreen (I assume) so those could be isolated but it would require having to separate systems for critical and non-critical operations.

> and I'm very happy that they care about touch, thanks to them using the touchscreen on my new laptop has been a pleasure.

I helped someone sitting next to me on a flight deal with the fact that the touchscreen wasn't calibrated, you had to move your finger around and see where the cursor ended up, then start to translate your pokes a few inches.

Paint and Wordpad are two of the "classic" utilities that stayed untouched in Windows 10 - even though Paint could benefit from some touchscreen-friendliness, for users with touch screens, that is.