I've worked on something like this, just a lot more mundane. We had Linux PCs strapped to the ceiling of various locations, mostly malls, together with a camera

I've worked on something like this, just a lot more mundane. We had Linux PCs strapped to the ceiling of various locations, mostly malls, together with a camera and projector to produce an interactive display on the floor. I had a couple of times where somebody would be onsite and the projector would be off or the display would be mangled. And it takes quite a while to get a lift to get up to the box (if it would even be allowed at that time of day), there was no network at that time, and all they had was a wireless IR keyboard that occasionally dropped keypresses. Imagine dictating shell commands, over the phone, to a salesperson who has no idea what half the characters are that you're asking him to type, and the only output signal I could come up with was ejecting the CD tray, which was just visible from the ground... (Note that the goal wasn't usually to fix things on the spot, it was more to triage things like whether we needed to have a replacement projector on hand, which was a big deal.)