I like that idea. I think that it could apply to restoration/repair of parts that are not monitors. Coin door restoration for example has several threads right now, joystick repair has come up in the past, coin mechs, leaf adjustment, troubleshooting and repairing game main boards, polishing bezel and marquee glass, t-mold slot repair. Some of these things very slightly overlap the other forums but I think that they have more in common with each other than any other section of the forum.
Good idea, hope I haven't tried to steer it in a different direction than you were aiming to, although rereading your post I think I may have. I kind of disagree with your last statement actually, a restoration project as a whole is quite similar to a built from scratch cabinet, it's the individual pieces of the project that differ so greatly.
In summary... Great idea for a new area of the forum (at least the name)...It should be about something different than you said (sorry)...I think that restoration projects fit nicely with ground-up projects.