I used to dream of owning one of them.
Now, your average £100 (GBP) smartphone does all that used to do. As phones for smarter n quicker, PDAs like that dropped off, esp with the likes of a Nokia communicator about. Now you get mini MS office Inc on my phone's, calander n email in all smartphones, so why carry something that doesn't sincronise with your handset, which does what the 2nd device does, but better).
So to go back in time and carry 2 things would get on my TTs! Even back when you got proper mobile access to the internet for the first time, I DIDN'T want 2 things (remember portable WiFi boxes) .
When I got.my first (and last) laptop, I did bring it to town a couple times, but couldn't be arsed with carrying that thing about, just tongonin maccies for free WiFi.
Uneven have a 2nd wallet, So in the summer, I can condense to minimum crap! It's a smaller wallet, with a coin section, that fits inside my "bum bag", so I can keep bare necessities whilst in my shorts (cargo pant type shorts with the large pockets annoy me, cos if you use them pockets, it wobbles at the wrong place!).