I believe I found the part you're referring to, in Apple's transcript of the talk, and I'm afraid I have to agree with your assessment. What I've found starts like this:
> But designs evolve, hardware advances, and what was once cutting edge becomes the expected baseline. The Objective-C language, AppKit & UIKit frameworks, and Interface Builder have empowered generations of developers. These technologies were built for each other, and will continue to serve us well for a long time to come, but over time new abstractions become necessary.
https://developer.apple.com/videos/play/wwdc2022/102/
It gets worse from there, for Objective-C. The speaker goes on to basically say that the new triumvirate of "integrated language, frameworks, and tools" is Swift, SwiftUI, and Xcode Previews, and that these will be evolving together, and influencing one another's evolution, as Objective-C, the "kits," and IB once did for one another.
I love coding in Objective-C, and did so for work for almost 5 years. (I've within the last year switched to a front-end developer job.) Swift, to me, whatever its upside, feels like it was written by someone who hates Objective-C. That makes me sad.
But, putting aside my editorializing, I read what Apple is saying as basically this. Objective-C, etc., is all but deprecated. At long last, it's being left behind. You may get away writing CRUD apps for a good while longer, but all the new stuff will be Swift-only, and at some point any UI written in Objective-C is going to start to look dated, once the inevitable innovations come.