You can sort of do this now with minecraft, you can host a blank world with nothing on and then start going mad building your own buildings and cities. The server I have running we generated a random world and I have a full on own with actual NPCs living in it and every other village I discover I've given to a friend for them to develop and live in.
So if something like this exists then no you're not crazy at all from the digital side of things at least. As for tronifying your computer room I am just totally jealous I didnt think of doing that already! Sounds like an awesome idea!
you could even get one of these too:
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