All Surface Preorders: What is the use case you are buying for?

I have not pre-ordered, and don't plan on it(can't justify the cost, though I do want it). Currently I only use my tablet(iPad) for consumption, social media, etc. and am largely tethered to desktops for work(AutoCAD, BIM). I want to hear some compelling use cases. The operating system and form factor are attractive but I want to hear what new avenues it is opening up for others.