- Effectively instant-on. (Unless you really do a hard shutdown.)
- No quitting applications.
- No exposing of a file system to the user. Any concept of “saving” has to do with the user-interface rather than implementation details that should be hidden from the user.
- Echewing the overlapping windows user-interface of desktop systems for more of a screen-oriented style. In fact, the iPhone may go farther in this area than Palm did. (The Palm OS had a Mac-ish menubar.)
Even my old Palm V, however, had better To Do List and Memo Pad applications. Which were virtually unchanged from my first Pilot, if I recall correctly. (Was it a 1000 or a 5000?) Both of which I used heavily. You can get by with web apps on the iPhone, but I notice a real difference between a local iPhone app & the extra latency of a web app. With the SDK coming out soon, though, that should be remedied.
Oh, and the Palm V also worked well syncing with multiple computers. I used to use it to keep my contacts on my home and work computers synced. I’ve heard that doesn’t work with the iPhone.