Old Tech: Question everything (although really? Seriously? Either way, fun article).
Old and obscure tech: Trompe
Old and obscure tech in use: Trompe powered mining
Museum of manufacturing Tech. I’d like to go here.
Modern Tech: Hobby Scale Robots. Kevin really likes these.
Future tech: Light Field Photography (bonus: the photo is interactive:) I can’t wait for this to be in mainstream, consumer grade cameras.