I don't know about feeling the need to show everyone my iphone - but there are certainly a lot of captains who are intrigued enough to ask if they can have a look at the apps on it.
Smithy - Have you taken that giant leap into the 80's and bought a VCR or a microwave yet?
Why are people so rabidly for or against these things? If you don't like it - don't do it!
As regards the ipad - I can think of one reasonable use for it... Reference. My company issues all manuals electronically. Having that search option available on the flightdeck would be occasionally useful. But then I can do that on the iphone too, just on a smaller screen.