Agreed! I had one too and you could do real work on it like spreadsheets and documents. I feel it worked better than current phones and tablets.
Later I switched to a Nokia 9210 Communicator (Nokia Series 80), basically a Psion 5 with networking and phone integration and a nice screen.
My living-the-future-moment was in the early 2000s sitting in car on the phone, then opening the phone, automatically switching to speakerphone and loading a spreadsheet to check some data. Later I emailed the sheet to a colleague and send the sheet as a fax from the phone to a customer. All from a single device.