Hilton wrote:

I find it highly 'optimistic' that pilot would use a Pocket PC's
instrument chart in flight as their primary which is what most pilot tend
to say; e.g. "I don't always have my paper charts", or "This is cheaper",
etc...

With what are you comparing the use of a palmtop for plate display in your
determination that it is unsafe? A complete lack of plates? Or having all
the necessary paper plates?

Even if the latter, why do you view the palmtop as less safe? Size of the
display? Reliability of the device? Something else?

What would the electronic device need to be/do/have/etc. for you to consider
it at least equally safe as paper?

- Andrew