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Brain-computer interface easily slips in and out of ear canal
(medicalxpress.com)
This is a most excellent place for technology news and articles.
They've been doing the things you're talking about since the early 2000s, surely they've progressed more than that. I remember them saying that they can actually do the art you see in your head like 5 years ago.
I'm not trying to be pedantic cause I'd actually kinda love to be wrong here, do you think you could find your source for that art thing? I'd love to read more about it, my understanding was that progress in this field was slow compared to the scales we're talking about here
On the games, they're on the market now and being sold: https://www.scientificamerican.com/article/pogue-6-electronic-devices-you-can-control-with-your-thoughts/
On the art, a puff piece with solid studies behind it (sorry wrong, it was 3 years ago): https://www.psychologytoday.com/us/blog/the-future-brain/202009/new-brain-computer-interface-transforms-thoughts-images