Isn’t a full HD resolution ( 1920 x 1080 ) almost four times less pixels than 4K ( 3840 x 2160 )? I think I understand that a higher bit depth gives me more information per pixel, resulting in for instance less banding, but I still expected my 1080p 10-bit video files to look very soft and literally low-res.
So the very basic is that 1080p is a great resolution no matter how much they want to force everyone in thinking 4k should be the minimum to sell more hardware.