HN user
There’s definitely a lot of merit to this idea, and the gifs in the article look impressive. My strong opinion is that there’s a lot more to (good) UIs than what an LLM will ever be able to bring (happy to be proven wrong in a few years…), but for utilitarian and on-the-fly UIs there’s definitely a lot of promise
Brave are working on their search engine, they have been slowly inviting people to start using it (I got my invite a couple of weeks ago). As far as I know, it doesn't rely on other search engines for its results, although they do provide an optional setting to enable Google fallback in case a query doesn't return enough results, which mixes in Google results together with Brave's own.
Overall, I've been finding it pretty good. It has information cards for various entities on the right-hand side, similar to all other search engines. You can additionally search for images, news, and videos.