"Even though I am a geek I oficially don't get why anyone would spend so much time/money/space doing this as you can just go out and buy a functionally much better CPU for pennies that would fit easily into a matchbox."
It's quite tricky to teach visually about CPU logic design using a CPU in a matchbox. It would be like training a chef to prepare food by giving him a fiver and telling him to go and buy a big mac.
And you matchbox wouldn't get you publicity, a shining CV, unlimited admiration.
Or have I been whooshed?