Given what your typical MAD SCIENTIST can do with a handful of gears and a steam boiler, I usually tag it as a subgenre of fantasy, not of SF. Just like Tolkien's medievalism, it's set in a romanticized version of the world before the technological revolution in progress as its being written. With magic.

I predict that once the Information Revolution is over, and the next one has begun, there will be people writing fiction set in an exaggerated, magical caricature of the early 2000s.