I can tell you one impact -- there are huge amounts of ChatGPT helped, or entirely written, junk papers appearing at conferences, which is causing serious problems getting reviewers. Some large events have introduced a pre-review phase to filter out junk, but it's getting harder, as LLMs are good at producing plausable looking nonsense.

Honestly, I'm not sure of the long term solution here. Conferences and journals may have to introduce a system where you need an existing member of the community to "vouch" for your work to be allowed to submit (they don't have to say it should be published, just worth reviewing).