The HP IPAQ didn't have a keyboard on standard models. Touchscreen only for text entry, with a little stylus to tap it out with. Around 5-10 hardware buttons around the case for things like back, volume controls, power etc. POCKET PC had excel, word, played and recorded audio files but was difficult to use and sluggish on the lower end models.
The top wiki picture with keyboard is one of the later models aimed at the Blackberry corporate users.
Iphone wasn't that innovative, just did things simply and really did "just work", which was a big deal at the time.