Because, for example, I'd prefer to travel with a single device and the MacBook is better than the iPad at certain things and vice versa. It's not that big an imposition to take two devices to be sure--and I'm sure Apple doesn't mind the extra sales. And I can mostly sub my phone and maybe a Kindle if I'm trying to go light. But it feels as if there's the potential for a unified device someday there--if it can be without compromises.
Everyone knows two screens are better than one. So take both, and use the iPad as the second screen when using the laptop, and as a tablet when you’re not?
