@kev I have a 4k monitor in the office and had to reduce the screen resolution because I connect my laptop with HDMI to it and HDMI can do max (I think) 30Hz with 4k which makes moving the mouse really painful. So my recommendation: 4k monitors are great but check in advance how you want to connect your device to it and make sure that you can use a 4k resolution with a high frequency to have a smooth experience.