This seems like an unnecessarily unkind response. The post you're replying to is sharing their opinion and asking what people who are in the industry think about it.
I think resolution will be important the smaller (or further away) the movie you’re watching is. And for things like text in apps.
If you’re watching an IMAX-size screen in AR, the resolution of the content will be the main factor, I think, rather than the density of the goggle displays.