Are you sure about that? Even today many cinemas only use 2K projectors. A lot of cinema isn't being captured at 4K or higher even today.But 4k resolution was set on stone way before HDMI put it in-spec. There were movies and cameras capable of 4k before it, so 4k resolution existed before the release of PS4.
Just saying a theoretical resolution that's 2x the current bleeding edge tech with nothing that can display it doesn't make it exist. On the PC side 1440p monitors were coming out.
Your response was a magical PS4 that couldn't support 4K was from 2005. There were no video output processors that would do 4K in 2013 when the PS4 was released. Then you bring up pre-2005 when 1080p wasn't even a think in people homes and are trying to argue 4K support was around?
Could you work on images and video that were at 4K resolution back then in terms of photo software or 3d rendering? Of course. Printed media can go to 1,000s of pixels per inch and are insanely higher than any of our display panels dwarfing what 8K can do.