I'm going to give an opinion here that has no evidence- so consider me devil's advocate-ing, I'd love to see contrary evidence. I have long suspected that Chris Hadfield has been phenomenally popular among the tech-inclined, tweeting classes- but has had a far smaller impact on the 'everyday' person.
I do not mean this as a slight to him in any way- I think he has done everything and anything that he could. But the mainstream media seems uninterested- the height of the NASA space faring days was when there were about four TV channels anyone watched- the mindshare it captured is incredibly difficult if not impossible to replicate today. It's very sad.
Listening to the kids react in wonderment as he demonstrated wringing a towel out in orbit really drove home that he's reaching, and really reaching, the right audience in a way that NASA has struggled with for decades. He is exceedingly well-educated and is probably aware of declining interest in STEM among younger kids and especially declining interest in space travel as a whole. (I don't have data to back that up, just basic anecdotal experience much like you, but it seems true.)
(Mind you this is Canada where he's perhaps getting more press as a hometown boy done good)
That accomplishment is even more notable because while Canada has a space agency, most of the world wouldn't consider Canada "spacefaring" in the broad sense (also not a dig at Canada). That a man challenged himself in his career to become an astronaut without a clear path to orbit, then reached a position where he can bring space travel to YouTube, Reddit, schools, and countless young minds in a new generation with the light touch required to "make it stick" is an accomplishment worthy of immense praise. Maybe a Nobel.
EDIT: Holy cow, this got flagged off the front page in the time it took me to get coffee.