The screen isn't just better, it's worlds better than the iPhone's screen. The cameras are similar, with most review sites giving the S8 the win, but that's probably only relevant to people who spend all day with two images side-by-side looking for the differences. If you just want to point and press, both will be pretty much the same. In other words, it doesn't 'fall short' in every other way. I came from an iPhone 6s+ and I've found Android to be superior, simply because it allows me to set it up so that I can use it all one-handed (I can have additional home screens with my preferred icons all in the bottom-right and I have the 'back' button there as well, therefore everything is within reach) and that's a really big bonus for me. I've also found the themes to be quite good as well. With Apple, you can only use it as Apple wants you to use it and you kind of get the feeling that it's not really your phone.
Having said all that, iOS on the 6s+ was still vastly smoother than Samsung's implementation of Android and it's the one thing I miss about my iPhone. Either way, it's not really worth changing the phone. Wait till every device has a surface-covering display and then decide what you want.
