This will be the same as my Dell's 2560x1440, which is perfectly fine.
Some people will argue till the cows come home, but not everything needs to be retina....
Yeah it's nice on my ipp, but so what.
That will be fine. 27" 2560 x 1440 is what the ASD and 5k iMac actually default to as a "looks like" resolution.
It may not look quite as sharp as an ASD using 1/4 of the pixels that does, however you won't have any issues using it in reality
Right now I have a 5,1 2010 Mac Pro, so I suppose it won't look different than it does now, right? I was just worried that the quality might decrease as compared to what I have now.
Don't need more sharpness for the moment, personally I think the 2010 LED Cinema Display is an awesome monitor and that's why I've been keeping it for so long. The image is still very nice.