Because when Psion were about, it was purely business folk and techies that used them.
Now every asshat has one of these phones, they buy the ones their told.
Its up to them how they design them, who they chose to market them to, its not like people wouldnt have bought them a few years back if they were designed/implemented appropriately... the fact is they failed at their attempt.
Xerox came up with the first implementation of a windows based GUI - apple were the ones who spotted the potential in it and developed the idea, microsoft later copied much of apples implementation... you dont see people walking around with laptops running Xerox operating systems these days...
ditto to the mouse - Xerox were the first - it only gained popular appeal when apple spotted its potential
they didnt get to be successful because there were a bunch of so called fanboys waiting around, apple was in major trouble and no-where near as popular in the 90s - products like the ipod and iphone have since been very successfully launched - if there are fanboys around now its because apple has won them over with their products
the iphone, the app store are successful because theyre well implemented and well designed
there is a good reason why Apple is now worth as much as Microsoft - they design and build **** that is easy to use and works and they are innovative with it
I never took much interest in apple until I got an iphone, it was after that that I thought Id try a macbook - Im pretty happy with that purchase too