I can tell the difference perhaps I worked in R&D at a local lab back in the early 90s and I may have trained my eyes to notice. I’m also a photographer and we tend to pay more attention “it looks great on my teeny tiny smartphone screen” user. I’ve seen what my 24-megapixel image looks like in 720p, 1080p and 4K. They shine in 4K. Also, the 55″ 4K TV is an excellent monitor when I want to work in a different room.