I guess it is a matter of looking at the way the market is being segmented.
While it is a cool neat feature to have a PDA phone combo, it tends to get too bulky and I think the 56xx kinda moves away from industry trends to get smaller slimmer sexier machines.
Also, there is the issue of how much Joe Public will be willing to pay for such a combined unit. Phones are already subsidized in some countries where they can be had for free or close to free with a contract for 1-2 years.
This will require a change in the way companies like Toshiba/hp/Dell and other PDA companies do their business and handle their channels.
I have seen the new MS SmartPhone and gotta admit it actually looks pretty nifty. It is actually far more snappy in response than my current Sony Ericsson P800. Dunno abt stability tho
