I think the Hunkin exhibit really did look a bit tired - I don't think it's necessarily unreasonable to try something else. After all, Secret Life only got its chance because they were willing to change something back then.

If you like Tim's stuff you can always catch his Novelty Automation arcade over by Holborn. Highly recommended by me at least!

I don't know how good the information transfer was at the London Science Museum way back when I was a kid; I remember excitedly spinning all the little brass handles and pushing the brass buttons on various teak cased devices, but I'm not sure I took much science home with me. Sci Fi, a home computer, and (much later) Bill Bryson's book informed me far more.