Do you mean getting this as a second monitor to play games as well, or as in a replacement monitor?
As in a second monitor, if you play on having one game across both, it wouldn't be worth it (In my opinion).
As in a replacement monitor, is there anything wrong with your current one, and if so what? If it is something major, it probably is a good swap, but there are better monitors out there as replacements.
If you're wanting to get it as a second monitor, but the game only on one, then if you have the money and your GPU can handle it, then why not?