So I was at the Apple store yesterday getting a hands on with the iPhone 8. I really want to try the augmented reality, and whenever I launched an app the Apple store staff said, it crashed! I restarted the phone, and the same thing happened. Launch an AR demo app, and it crashed on the iPhone 8. I asked the Apple staffer what was wrong, and he said "there were a lot of apps installed on the phone, so it may be causing the crashes" and instead pointed me to the iPads. He said the iPads should work fine, they are bigger with ProMotion displays, which have 120Hz refresh rate making things like Apple Pencil feel really fluid and screen interactions are said to be liquid smooth??? (I didn't pay attention to the screen interactions, just played with the dragon AR app where a cute dragon stands on a table)... sounds like a great way for him to sell me an iPad by telling me how the AR just doesn't work on the iPhone 8's and run better on the iPad. Reviews seem to be all over the ProMotion display that gives the iPad that 120Hz refresh... what do you think about the possibility of a ProMotion for the next iPhone after the 8,8+,X next year? Is 120Hz really that big of a deal for iPhone even though the iPhone does not support the Apple Pencil and has a much smaller form factor than an iPad? What is the big deal about ProMotion?