A prototype is available, though it’s Chrome-only and English-only at the moment. How this’ll work is you select some text and then click on the extension, which will try to “return the relevant quote and inference for the user, along with links to article and quality signals”.
How this works is it uses ChatGPT to generate a search query, utilizes WP’s search API to search for relevant article text, and then uses ChatGPT to extract the relevant part.
Obviously Wikipedia is not a definitive or 100% accurate source but this sounds like a genuinely positive use of AI to combat misinformation. The people it really needs to reach likely won’t use it but it’s still a good idea.