Win8 handles Retina displays much better, but still not as nicely as OS X. I ran it in Bootcamp on the mid 2012 15" rMBP for a while and it did ok.
I was using my non-Retina mid 2010 27" iMac for a while as my main Mac before the 27" Retina came out and hated the display. It has a similar display quality to the horribly outdated panels still used on the Airs.
I just bought a new iMac 27 for the house and I made sure it did NOT have retina. I do a good bit of PhotoShop but the retina is just not that big of a deal and I have seen and looked at them. I run Windows on all of my Apple computers as AutoCad is not going to work otherwise.
It is good we all have a choice. I do understand that Win8 does do better with Windows fonts but am going to wait till Win10!