[floatingatoll]

That's already possible today, yes. Safari shipped support for all this live in production some time ago and I assume Chrome and Firefox are either already there or working towards it.

I've always wondered what it'll take for the major OS manufacturers to implement an anti-seizure filter for the content they transmit to their screens, and I'd bet that a flickering ad at HDR max brightness causing seizures worldwide one day will finally compel them to do so.