> You now have fingerprints all over your viewing area. Good luck cleaning
> skin oil off a plastic display. ;-)
>
> You get no tactile feedback from the "keyboard".
Previously Nokia and still today many car manufacturers rejected the
touchscreen keyboard approach for those very two reasons.
> As a matter of fact, my sat nav device uses a similar on-screen keyboard.
> While it's a little slow to operate, it's not *too* bad... The key [pun!]
> is to make the keys big enough to hit reliably. Not all products manage
> this.
It's not just getting the tactile feedback of having pressed a button, but
getting the tactile feedback that you are over a button before you press.
Try pressing those buttons on your satnav screen while driving fast on the
motorway - then try controlling your radio while driving using real
buttons - which is easier/safer?
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