Just for example. I was trying to remember a film that is basically a knock off of war games involving two teenagers using a scientists small helicopter to do stuff. I typed into Google "film with small helicopter" and it was not only the first result, it was in a little cut out section highlighted at the top. The film is called Defense Play and it has a grand total of 144 votes on IMDb. Incredibly obscure.
I thought it would be fun to ask ChatGPT roughly the same question and at first it just gave me a list of very popular movies with large helicopters. So I said, no this has a small helicopter or a toy helicopter in it. And it gave me a list of films with helicopters but three in Toy Soldiers, Small Soldiers (which probably does have a small helicopter in it) and GI Joe (which is based off a toy and has a helicopter probably).
No matter how much I insisted that this movie is obscure it can't quite figure out how to do anything about returning things that match something as vague as "obscurity" even though there are measures (e.g. IMBd votes) available that could reasonably give it such a notion. It probably does know about the movie, but whenever I ask about obscure movies while it often can give me a year and the first few actors in it it does seem to make up the plot even when asked to just paraphrase whatever plot synopsis it has available to it.
I do see it improving but I also wonder if a model which is heavily weighted towards guessing the next section of text will have difficulty with the unlikely scenario of someone being specifically interested in an obscure film a handful of people have ever bothered to watch. Seems really useful for searches where a person doesn't really know what they want, and very not useful in searches where the person knows they need a specific and obscure piece of information potentially.