Ask HN: Best Monitor for Programming

Now that I'm going to be working from my home office indefinitely, I was looking into upgrading my setup and getting a new monitor. Currently, I'm using a 1920x1080 24" Acer.

I'm looking for more screen real estate, but more importantly, I'd love to get the sharpness and pixel density that my Macbook's retina display has. Not terribly worried about price, but would like to say under $1000

Any suggestions?