Non-goal until someone do it with Android or Windows Phone. Then it will be a goal. IF it was technically viable having a tablet capable of doing laptop-class processing, of course I'd want it!
Why I would want two devices occupying my briefcase if I can have only one? Of course an iPad-sized Macbook Air would be a nice thing to have! If it was as capable as a Retina Macbook, even better.
Convergence is the way to go. Of course it's not interesting for companies narrowing a product line into a single one, but for consumers of course it's a good thing.
11" MBA. Bought one last June instead of iPad. Wife got the shiny new iPad. I love this thing. It is a teeny bit bigger than an iPad, but not my much. A little more expensive to be sure, but i enjoy having Logic pro and final cut pro at my fingertips at a moments notice. And I am better at typing on a classical tactile qwerty keyboard.
Just my thoughts.