I tried and failed spectacularly at making this leap late last year with an iPad Air 2, though my experience largely supports Steve’s thorough analysis of the highlights and lowlights. The central issue was the keyboard— if my central workflow requires writing and design, why wouldn’t I want the best integrated keyboard possible? And I get a display that can sit on any surface, adjust to any angle, and doesn’t require an add-on to avoid being scratched when I put it in my bag?
I futzed for a couple months and realized I’m not that much of a mobile worker either — I have specific spaces I go to think and write rather than needing to do it on the fly. I returned it and bought a Macbook Pro. That transition highlighted the central tension users are asked to choose between — do you want to optimize for reading or writing? My hope for tablets was and remains they obsolete the need to write so much in communication, but that was neither my experience nor the overall trend in communications. Messaging is everything, though the potential mediums (photos, audio, and video) are expanding into more areas where tablets have distinct advantages.
Ultimately, I will be disappointed if I ever need to buy another laptop, either because the tablet or how I work has not evolved.