Here's the Psion Press release of 11 July 2001 in which the change of Company strategy was announced:
http://ww6.investorrelations.co.uk/p.../ir22993.shtml
In a nutshell they are slimming down (250 redundancies) and going up market to the big hitters but shying away from the Bluetooth stuff as that market is not developing quickly enough.
Where we are it won't make much difference and you may pick up a Psion PDA cheaply from a Clearance warehouse. But long-term support will fade away. I would not buy one, personally.
I guess the hand-held competition was too hot for them.