What kind of technology surprised you last time?

We keep seeing things like AI and LLM. But I'm happy about technology products that go beyond the occasional. For example, today I read that Aura is introducing a $499 e-ink digital photo frame that allows you to work without a cable.

I was also happy with the @Flowtica Scribepen from @zaczuo .

Do you have a favourite technology, apart from software, that you consider truly unique or outstanding in the market? For example, some hardware devices. :)