I got a few minutes over the weekend with the Galaxy S8 and I was impressed. It wasn’t an amazing experience because many of the classic ’Samsung’ annoyances remain such as childish icons and an interface that needs some serious work, but there was something special about the screen and the form factor.
It took no time at all for the design to make sense and to feel comfortable. It actually made perfect sense to the point that I suspect that any phone with a screen like this will feel perfectly normal instantly which may take the surprise and novelty away for some.
If Apple do something similar with the iPhone, the press will be enormous for it and I suspect that users will moan after a week or two of use, but that does not take away from the fact that it is a very good idea and obviously makes much better use of the phone size.
This feature is not enough to make people change platforms, but it will no doubt be seen as beneficial by anyone who uses it.