When you get to know the Zaurus well, you will see that it is not really a PDA, but a full pocket computer!
You can watch movies; play music; read books; browse the web; retrieve, read, write, send e-mail; write and compile code; do network analysis, security evaluations, and configuration; keep track of your contacts, schedule, todos; run java applications; write and compile java applications; use it for astronomy; compose documents with full formatting capabilities; maintain complex spreadheets in the field; keep relational databases on CDs, workouts, shoe size conversions; and many more! (anyone else have things that only Zaurus can do?)
I remember one DevNet post that a network admin used his to troubleshoot and fix network problems with a cell phone cable from the golf course so he did not have to go into the office on weekends.