Go watch the horizon gameplay on a 4k tv and if that looks like it's worth 400 (to me it easily does) then buy the shyt, if not go fukk yaself. It's that simple.
Some people are really upset about the PS4 Pro even though they've never seen it in person running on a 4K HDR TV.
Dudes never seen it, but are quick to let people know that it's not good, it's not "real 4K" and it's bad and it gives you cancer so and so forth.
The shyt is way better apparently than 1080P from people who've seen it in person and looks really nice on a 4K TV. Nobody said it's better than native 4K but people seem to want to infer that because some folks saying it's going to look really nice even though it's not native 4K.
It's better than a regular PS4 and XB1/s point blank. No amount of "but it can't play 4K blurays" will change this fact.