Am I confused?

As far as I can determine, Psion used to make awesome PDAs that fell somewhere between a small Eee-pc and Nokia's N810 "internet tablet." And nothing they used to make has really been re-achieved by anyone today.

But, significantly, Psion does not presently make anything even remotely of the sort, nor do they appear to have any plans to do so. They aren't in this market anymore, even on the periphery. Their "handheld computers" look like something that would get used as a ceremonial cudgel in a particular kind of post-apocalyptic sci-fi film. And that's as close as they've got. Their target demographic isn't even close to the target demographic being served by Eee-through-N810 devices, whatever they might be called.

So exactly what is this costing Psion, even if they're right about trademark infringement in the abstract?