That's an interesting angle. My Father actually, by chance, owns a residential drywall and finishing business. The 'did the plumber show up' factor is key. Though I'm not sure why this couldn't be solved by having the subs of a builder agree to give basic job updates. How do residential customers feel about someone's camera watching their house?
Anything that makes the GC more efficient is going to be a win for the future homeowner. This might get more problematic for remodels, but we primarily work with new home builds.
The GC can often bill it down to the homeowner as antitheft, which reduces time/money to complete the build. The biggest being time. An example, if custom windows are stolen, it could delay a project by months right now.
