petri[.]com/windows-11-is-faster-even-on-identical-hardware
Gamers with the money to spend will opt in for Win11, because it'll be the only version of Windows fully supporting the next generation of Intel CPUs, and the Alder Lake-S Core i9-12900K is expected to be a beast. For the [probably AAA] games that might support it, there's also Direct X 12 Ultimate & Direct Storage, though it'll be expensive to take full advantage, e.g. Nvidia's latest, top graphics cards & the highest end NVMe drives. Then there's AutoHDR, intended to give you the best 4K HDR display gaming, allegedly improving the looks of games that support HDR along with those that do not. Problem is that for real, full HDR you'll need a decent 4k TV that meets the HDR specs -- most 4k PC monitors do not.
So while there'll be plenty of loud, sometimes obnoxious Win11 fanboys with deep pockets shouting about how wonderful it is, what does Win11 hold in store for the rest of us? Limited compatibility and support for a limited selection of Android apps *someday*, and some incremental improvements that'll be mostly noticed on lower end hardware. Slower or less powerful CPUs spend more time at 100% utilization, and Win11 is designed to mitigate that -- you'll spend less time just waiting for something to happen when the CPU's under heavy load. Microsoft also designed Win11 to use a little less hard disk space, so having a smaller drive will hurt just a little bit less. And if you've got a less powerful device &/or a slower internet connection, Windows cumulative updates *might* take a bit less time, since Win11 will only download the parts of the update that need to be applied to your device. That of course will not likely have much effect on those updates just taking forever on the lowest end CPUs.
Otherwise things like Windows Hello sign-in and waking from sleep will be faster, though I'm unsure how many would upgrade to Win11 just for that. There is a chance that gamers in the Steam community wlll find Win11 is overall faster than Win10, the same way they found Win10 faster than Win7, and that'll speed adoption, but unless something like that happens IMHO most will wind up upgrading simply because Microsoft will make Win10 go away same as Win7.