Windows Phone Thoughts: Symbian Exec Says "The PDA is Dead"

Here's a strong statement for you:

"Gadget lovers could find that their mobile phone fulfils all their needs in the very near future. So says David Levin, head of phone software firm Symbian, reviewing the firm's future prospects. He said the falling cost of putting extras, such as cameras, into handsets would mean big changes for the consumer electronics market. But, he added, it would take time for consumers to start using all the features in their increasingly smart phones and perhaps longer for operators to work out ways to generate significant amounts of cash from new services."

There's some solid logic behind his statement, so be sure to read the whole article, then come back here and comment. Is he right? Will PDAs be replaced by smarter mobile phones? I have my own opinion on this, but I'm very interested in knowing what everyone here thinks. What would your mobile phone have to become in order for you to only use it? Conversely, what sorts of things will the Pocket PC have to do in order to remain a viable option as phones start to do more?