"Palm created a brand new OS, which I've often said is the right
way to approach a brand new device; one size fits all just doesn't
work outside of hats. It's Linux based and is called webOS. It's
designed to be controlled via a touch screen using gestures and is
ultra lightweight. Sound familiar? Did I mention that a former,
kind of super important, Apple guy spearheaded the effort behind
webOS and the first phone based on it?
"Minimalism for the Masses
"When the iPhone first hit, the fact that it only had four
buttons was huge for a smartphone. The Pre echoes Apple's design
philosophy and features a similarly simple approach. When closed
there are only 4 physical buttons on the device (5 if you count the
volume up/down buttons separately)."