Yes but that's just semantics. Is the phone being made physically narrower to make the bezels thinner, or are the bezels being made thinner with no change to the physical width of the phone. Like the chicken and the egg it doesn't matter, only the end result of how large the screen is and how thin the bezels are.
I'll agree to disagree on Samsung phones eating up real estate, but these are just our opinions and how we see the phone. Text on the sides gets distorted, covered by glare, I've seen reports of decreased s-pen sensitivity, edges get covered by fingers, ghost touches, etc. Once again these may or may not be issues for you, and Samsung has improved this with each successive generation of curved screens, but the issues still remain in my experience. Although I'll temper my experience with the Note 8 as only fondling one in store.
I'd also disagree that the phones are substantially "bigger", they are taller and that is different IMO. If viewed in terms of width they are actually smaller/narrower, and not all of that is a function of the 18.5:9 ratio IMO. I'm sure that the usable space on the Note 8 is bigger than an iPhone plus, but that doesn't necessarily mean it's a good thing. I'm sure a 10" x 2" phone would have more usable screen as well, but it's not something that would be functional. Of course that's an extreme example, but you get the point. At this point I prefer the ip7+ screen over the note 8 ONLY on the basis of size/width, side by side it actually looks larger (even though it isn't). My favorite phone to compare to is the Mate 9 which has a screen which looks huge next to the N8, yet is technically .4" smaller. Of course the caveat is the bezels are fairly large.
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I'll have to take your word for it, I only have a few minutes in store time with the Note 8. But on my last curved edge phone, the Note 7, I found slide out actions more difficult as I felt I had to slightly curve my finger/thumb on the edge to get the slide out to appear. On a flat phone it was a more simple quick swipe. I've also found things do get cut off slightly, well not cut off but slightly distorted, especially things like small text on internet sites. Honestly it's far from the end of the world, and yes I'm nitpicking about a lot of this, but for $1000 you better bet I'm going to nitpick even the smallest design flaw.
Anyhow just my opinion, apologies if it seems like I'm trying to make it anyone elses.