"Great concept. I use a 21 inch Wacom. It's however not portable. I had a 21" Sager NP 5960 dual SLI NVIDIA system for Solidworks but no interactive screen. I've seen colleagues put a Wacom in a large cloth bag to continue sketching at home after work. I had a Cintiq Motion computer with a small screen and was way limited in power. The other comments about pens and notepads, people are using less of those items these days. I've been using an Acer Aspire R7 for a couple of years now to sketch. The pressure sensitive screen Aspire came out way before The Microsoft Slate I, II, III, IV or Pro. I'm an industrial Designer of 35 years and I need a big screen, sketching ability, Powerful CAD and portability instead of creating Identical systems ans setups for home, work or remote location. As designers our needs may be too unique to warrant  dedicated systems for our job category however through modularity possibly such a system could work for multiple industries."