If I uncheck that box the re point size is the same as in OSx and Win 7 but all images are horribly pixelated. Here are two screenshots; though not sure if this will show enough detail.
Retina setting on, Win7 Control Panel 'Display' at 150%.
Image may be NSFW.
Clik here to view.
With default settings; very pixelated but everything is a more useful size
