I think one of the biggest issues is transfer. It's SO easy to get your pictures off the iPhone -- no wires, no computer, dead-simple (hence the Flickr succes)

I think one of the biggest issues is transfer. It's SO easy to get your pictures off the iPhone -- no wires, no computer, dead-simple (hence the Flickr succes). High-end camera-makers would be wise to add 3G/wifi/cloud features, although the file-sizes of high-res photographs might be prohibitive for a while...