I had the iPhone X for a week. Screen resolution is definitely a step up. I just couldn’t get used to the smaller (narrow) screen. I use my phone to watch videos while working out it's a downgrade for me. Also, having to look at your screen and then swiping up to unlock the phone is a bit of a drag. With touch ID, it's just one step.
Returning the X today and going to stick with the 8 Plus. I'll wait for the X Plus next year. Everyone who is upgrading from a 4.7 phone and are not fans of big phones, you will love the X!
I had the same feelings as you in regards to the X. When you get used to watching content on a "Plus" device to me the new phone feels like a downgrade. Narrow screens are not just with Apple though as I contemplated Samsung which are just as narrow so unfortunately seems like that is the trend. If watching movies/youtube etc. on a device is one of your main concerns I don't think there is anything better from Apples lineup than a Plus in terms of screen real estate.