@MRU, with regards to actual physical size, have you handled the S8 yet in person? Just curious.
As you may or may not know, I'm a small phone kind of guy myself. The S7E last year was the only exception that I could handle only due to Samsung's design and ergonomics. At the time, it was the most maneagable phablet to date and really shamed other phablets.
The S8 is slightly smaller than the S7E. And though by numbers, the difference might not mean much, in person, it does. As someone who had the S7E for the majority of 2016, picking up the S8 was almost mind boggling, especially with respect to the width. The thing is very usable one handed, with only the upper portion a slight challenge to reach.
Didn't you express interest in the G6? The S8 is smaller than that one. It's also smaller than the Pixel XL, and for sure smaller than the iPhone Plus.
As for the curve displays, I have to say again, you ought to get some hands on. In my 20 mins with it, I had no false touches. If you handled the Note 7, then you have some idea of how small the curvature is. The waterfall effect is very minimal now. You hardly notice any of that green-effect. A stark contrast compared to the S7E.