I would (finally) my mind to replace my mobile phone and my (very old) PDA with a single device.
- Call (yes anyway)
- To pick up and read (possibly edited) Office files (Word, Excel) and pdf
- Sync contacts and calendar outlook
- A GPS (rather extra when I do not want to bother with) with maps on-board
All this for a fairly light use (for now anyway): it would serve me especially as my current PDA to have my files handy.