Honestly, I have a 4k beamer but 1080p is good enough imo. The higher the resolution, the more details which looks fake. Why would a movie look more sharp than real life. I miss the productions like Band of Brothers. Rough, no/barely cgi. Looks real. Also the details you see with 4k porn are the details I don't want to see. But that's just my opinion.
Also, do you actually see any difference between a movie of 12gb and 120gb? I do not.