Your don't trade in your phone to buy an iPad.<p>i.e. devices aren't social, their use is.  And their use doesn't preclude the use of other devices.  Ergo not every device needs to be useful for everything.<p>e.g. the iPod functionality of the iPad is technically terrible.  Does Apple expect you'll carry that thing around to listen to music?  But therein lies the rub: you don't.  You have an iPod for that.<p><i>My guess</i> is that the camera feature in the iPad SDK has more to do with a bluetooth interaction between mobile OS X devices than future iPad hardware plans.