No doubt you are right about iOS 16, but the question for many is whether any of those new features will make any difference to them!
And, new iOSs often have staggeringly negative effects, too, such as iOS 15's hit on the battery life of older devices. My iPad Air 2, for example, lost 2 hours of battery life as a result of the upgrade! And, that's with all those battery draining items turned off — background refresh off, Location Services off, etc. I would have left it at 14.8 or upgraded to 14.8.1 had Apple offered that via iTunes synching.
Maybe 15.4.1 will help.
But there are NO iOS 15 specific features *for me* and *my use* that matter. Indeed, the ridiculous changing of the Home Screen was a step back. As is that dumb so,it screen icon that gets in the way of tapping the URL bar.
As much as I’d like to get a new toy, I’m probably more likely to replace the battery!