windowscentral[.]com/software-apps/windows-11/windows-12-ai-new-ui-features-and-everything-else-we-know-so-far
The author, Zac Bowden, has a pretty decent track record when it comes to this sort of thing, but I think it's important to remember that even if everything he writes is totally accurate *Today*, Microsoft can change its mind at anytime on a whim. They've been pushing hard, and have lots invested in their efforts to buy Activision, with court fights in the UK and US pending. They may well wind up moving resources that would be used developing new Windows versions to support those efforts for example.
The main points are that Win12 will be like Win11 but with more of a focus on AI [& *I think* the cloud]. If you've been at this PC stuff long enough you might remember Math Coprocessors. New devices will likely include a sort of AI coprocessor, either built into the CPU or a separate NPU chip. According to Bowden, some or all of Win12's AI features will require either a capable GPU or one of these Neural Processing Units -- devices without can still run Win12, but without the AI. What *I think* may develop into a can of worms is compatibility, e.g., will the new CPUs be enough, and which ones, or will Win12 require a separate, discreet NPU regardless. As more apps & services adopt AI, you could have a situation where Intel CPUs work for this, & AMD CPUs for that.
IMHO Bowden saved the most important part to last:
But that doesn't mean existing PCs won't get a new version of Windows. Microsoft is working on "Windows 12" for legacy desktop devices too, but it will be without most of the modern platform enhancements being built for CorePC.
What billions of us will need come 2025 is Not new features, but something close to Win10 that will continue to be supported with security updates.