While I haven't owned a 4K monitor I have given them a go on display models on the gaming machines set up for customers to try out in store and couldn't spot what all the fuss was about other than it being 4k. Yeah text is smaller but you'd expect that. It's using a high resolution on a smaller monitor so text would look sharper![]()
Then the system wasn't set up correctly. Text should be the same size, using more pixels to produce better characters. Look at a letter printed at 150 dpi and one printed at 300 dpi: the characters are the same size but look far better. It's the same with screens, you just need to tell the OS the dpi and it should work out the correct font scaling.