This is just wow...

https://www.animenewsnetwork.com/int...eality/.131901

She must be a genius IRL.

That does look pretty cool. At first glance I thought they were real projections somehow, but then it becomes more 'real' once you see that it's projected along those spinning blade and not in air.

I checked out her channel a little after that, and I quite like the watch idea.

Quite interesting indeed. It looked good. It's not practical for a real toy for various reasons, but as a curiosity it was cool and also as a demonstration of technology.