Cut the crap, the iPhone 4s display was not the best before the iPhone 5. The htx one x had an indisputably better display. And currently the droid DNA has the best display on a phone.
Samsungs latest touchwiz unlike previous version is actually extremely nice and every one of the features they added not only is very usefull, they are well polished and bug free. I hated touchwiz before but it has matured extremely well.
Best display is not just about # of pixels/pixel density. So you cut the crap. HTC One X came out so long after the 4S but I'm not even using that as part of my argument. My definition of best display is clarity (which is not 1:1 with pixel density), color reproduction, and panel type (IPS, etc.).
Samsung's TouchWiz is still crap. But that is a subjective view. Many tech blogs also agree with the conclusion that stock Android is superior. But again, subjective view.
I don't know what kind of stuff you're smoking, but NONE of the features actually wok RELIABLY and ALMOST CERTAINLY NOT BUG FREE. If that were so, I guess the updates Samsung has since released for bug fixes are just plain BS just like your argument. S Voice, for example, is certainly NOT polished NOR bug free. Again, using this once on a demo unit in a store is not representative of the entire existence of said feature. I have friends who love Android and Samsung phones who don't use S Voice (for example) and other S features because they suck. They did love their previous Galaxy S phones.