I for one will never have a PDA until someone finds a decent solution for how to carry it about. They aren't "light" and not wishing to be considered a "geek" I don't wish to have it attached to my belt! Pockets mean things snap when sitting down. Suits are great for such items but hight unpractical for day to day life.
There seem to have been a mixture of reports either saying consumers want all in one devices or the opposite.