Why 27" monitor with 1080p is bad?

Hi,

Planning to buy new monitor but dont know what. Was looking for 24 inch 1080p with 180hz for some fps game.

I have now 2x 24inch 60hz, some cheap ones, using for work and game.

If I go bigger with 27, will use only one monitor. But I doubt my gpu will play games with 2k resolution, so was thinking on play 1080p on 27, Im getting around 140fps on 1080p.

As I know gaming on 27inch with 1080p is not ideal, other says that are blury, I would like to see some comparisson with images.

Thanks