It depends on what you're used to...in my opinion 4k on a 32inch is a waste. The biggest problem I have seen with a 4k tv is low refresh rate(anything less than 60mhz) will look choppy and blurry whenever the image on the screen moves, which is constantly. Also, input lag is a big issue with TVs. For competitive gaming, you want a 1ms response time, but for most people 5-10ms is adequate. Anything over 50ms response time is basically unplayable for me personally.
I use a 27 inch 1440p 144hz , and my brother plays on a 60inch 4k TV @ 50hz. His screen is definitely bigger, but it drives me nuts to play on his setup because of the motion blur (low refresh rate) and feels like im "disconnected" and slow in the game because of the high...