take a screenshot of a part of your screen with it on, and a screenshot of a part of your screen with it off. open them up together, and cycle through them quickly.
you WILL see the difference.
Heres a screenshot i just took for you.
http://i.imgur.com/ug7NRWr.png
Image
This is on a non-retina screen, and is scaled up, in reality, that detail is shown on an even tighter scale.
Looks amazing.
----------
thank you for your post,
but both those images look blurred. It seems Macrumors, when uploading the picture, downscaled the image, so both of them are blurred.
can you please upload the original screenshot to a website such as imur please?