Dr. Drang, showing a screenshot of his MacBook, explaining why Mac OS X wouldn’t work well as a touchscreen OS:
Look at all the targets. If they were all increased to a size
that’s easy to tap with a fingertip, there’d be very little room
left on the screen for content.
This is why iOS apps are so simple. More features means more big
targets on the screen, which means less room for what you’re
supposed to be looking at and working with.