I pre-ordered one of these from Newegg today (Linux version). It's more of a curiosity but could see it being useful for some applications. For example, for IT hotels, users could plug in their Compute Stick and have their personal desktop available.
Which brings up another point: When will monitor makers start building monitors with front-accessible HDMI ports? For a long time, PCs shipped with USB ports in the back. They became so useful that some enterprising manufacturers started putting a couple in the front. It's time for monitors to do the same.
Anyhoo, I could see how this would make an interesting cyber-cafe. Provide a bunch of monitors with HDMI inputs. Plug in your computer and go. Bill by the hour. Have an app that lets me order coffee and a backup coffee and I'd be there a couple times a week.