Ten years ago the Psion Series 5 had a 640x240 touchscreen in a clamshell with a keyboard that was (and still is) miles above anything else. And a browser. Too bad they chose to give in to Palms and PocketPCs before they got around to add colour, USB and Wifi...
Symbian OS and its apps were faster in 16 megs of RAM and a 66 Mhz CPU than modern PDAs of all makes and kinds.