Unlike the majority of people who tend to speculate; I am going to be realistic here.
Until it comes out, how would we know if it were worth waiting for? ANY information we have about the device is pure speculation.
The big problem with technology is simple - if you spend all your time waiting for the latest and greatest to come out, you will be waiting forever. I mean, say you wait for the iPhone 5 - it comes out, but then you think "Darn, should I wait for the iPhone 6? After all, I heard THAT was going to support LTE" - at that point you are back to the waiting game.