alt Hacker NewsPalm pilots had ui/ux more closely resembling today’s smart phones than you think. The swiping keyboards, for example, more closely resemble the script used for fast typing on a palm pilot. The ui was meant for touch, not for precision. At least the games didn’t have ads back then.
Today's swiping keyboards are nothing like the original Graffiti or Graffiti 2. Those used shapes/gestures derived from the actual letter shapes, while the swiping gestures supported by the on-screen keyboards of today rely on gestures derived from the QWERTY layout of the on-screen keyboard. Because both were simplifications of the completely different input methods they were emulating: pen vs keyboard.
Meanwhile, the rest of the Palm Pilot UI (all the parts that were actually on the screen instead of below it in the dedicated writing area) looks thoroughly 90s: the basic buttons, drop-down boxes, tabs and dialog box layouts, scrollbars that aren't trying to hide from you. The main UI elements missing from the Palm Pilot that were present in eg. 90s Mac OS or Windows are the free form desktop layout (instead of the smartphone-like app launcher grid), and the persistent on-screen menu bar or taskbar.
The Palm Pilot UI was unquestionably designed around the assumption of higher precision than today's touch-oriented UIs. The stylus was not considered optional. The lack of capacitive touch sensing for gesture recognition meant the UI was much more reliant on precise button taps where today's smartphones would use swipes and other gestures for stuff like scrolling or "back".