Originally Posted by BWinmill
It depends upon how you're using the device. If you're using it for content consumptions, such as reading or watching videos, then a pure tablet makes sense since it is more comfortable to hold. If you are mostly entering data, ranging from casual emails to programming, then an ultrabook makes more sense. Yet what of the people who are doing both? The ability to add or remove the keyboard is a benefit.
I have an ASUS Transformer with dock. I can use it as a tablet when reading, watching video, but as a Netbook when participating on MR. The added battery in the dock is a huge benefit, especially on long haul flights to Asia.