Yeah I know its pretty much a dream at this point just gauging interest in such a device as interest normally leads to research and then hopefully fruition.
Me personally minding the size probably not just was thinking what would be more practical (I buy anything that I see value in huge "Techy").
I'm on vacation and doing a quick sketch on my phone but later on while relaxing I wish to do more like run Photoshop then import the assets I created into unity, I would rather have something that wouldn't add much in terms of size and weight but I could still use to get what I need done.
On my way home from work I create a mock site using Adobe Comp, but when I get home will plan to finish this project on muse. In most cases I would finish my work on a desktop rather than a phone dock simply because its something I already have set up.
Scenario 3 ("Techies")
I can do a lot of things on my phone but also have the option to plug it into a dock to make it even more capable forget the price sign me up
In these hypotheticals the first would seem like the main use more power when your not in your normal environment, while with the 2nd it would become redundant if I already have a machine capable of doing this job. While the Third would seemingly be unconcerned with the size and weight they want to always be on the cutting edge if this device can do something new that nothing else can do I want it. So as to make it more appealing the Scenario 1 user it would be preferably smaller, while the 3rd would believably buy it regardless.