Why bother learning anything "old"? History? Who needs that? It's all about social media and what twitter tells me I should care about. Mashups for LOB apps man.
Seriously, are we debating whether kids should know where they are, how they got there, and how to get back? So, they should just simply walk around in 3D (technically, 4D) space without using any sort of spacial reasoning?
For clocks...thankfully, people can still distinguish night from day without needing their smartphone.