The only reason you'd notice a difference is because of the lack of a 55" 1440p TV. Otherwise, in a like-for-like situation, the difference gets smaller (hence why many PC gamers opt for 1440/144Hz over 4K/60 on 27-32" monitors). There's not a huge difference between those resolutions. HDR makes a bigger difference.
Well if we are comparing 32inch monitors side by side with one at 4k and the other at 1440p, than there will be very little difference. However when you jump to 55inch screens and above, 1440p starts to look blurry or stretched. You will want to start hitting 4k on the bigger screens. 4k on a 4k TV is outstanding, anything below starts to become noticeable to my eyes when using big screens. The bigger the screen the more pixels you will want. HDR does make a difference as well, HDR combined with native 4k is the obvious sweet spot for these new TVs.