* Right now, ChatGPT has a disclaimer that it doesn't know much about the world since 2021. This implies much of its training set excludes recent data.
* ChatGPT is brand new. Nobody has had a chance to reverse engineer it or game it.
* Most "search" is relatively simple queries. There's only so much you can do to differential a bunch of sites that offer the exact same facts.
I suspect, ChatGPT will reduce latency in its training data and people will figure out how to rank well against the algorithm. Then, it will be no different than just another search engine.