You're right, the curved display of the galaxy is much more sleeker and elegant then seeing that notch
Well you may think it's 'more sleeker' but that would only be with the phone off.
Not for nothing but those arguments against the Samsung have been levied against the iPhone x with the notch.
How have reflections down both sides of the phone been 'levied' against the X notch, where's the comparison, that makes not sense whatever. And if you're referring to the reflections down both sides of the phone hiding content then that also cannot be said about the notch because if you're watching a movie it will likely be in a 1:1.85 ratio which is the most popular ratio and that will mean it does not extend under the notch. You can make it go under the notch by filling the screen but then to do that you'd have to clip the top and bottom of the movie and it would be a bit silly to complain that the notch is clipping the movie when to do so means you have to clip the top and bottom.
As for photos, they also are not in a ratio that when viewing are clipped by the notch. Neither of these two scenarios are in any way comparable to the glare and reflections caused by the curved edges. It's a design that Samsung will soon be dropping. Compared to the Xiaomi mi mix 2 the Galaxy looks dated already.
And finally applications will be designed also not to clip any content.