TFT Central:
"As an example, text and fonts on a 28” 3840 x 2160 resolution screen are very small indeed, arguably too small for most users. Running the screen at native resolution for office type work can be difficult. Those with very good eye-sight might find it okay, but for many the fonts will be uncomfortably small, making it hard on the eyes."
Yes its my opinion along with a ton of others if you care to go look into it. You're better off saving your money and going for a 1440p at that size.