Unlike parallels, where the text is enlarged and resolution is increased. The native feel of the menu and taskbar is not scaled. Seems extremely inconsistent. Does Bootcamp 5 scale windows 8 properly (the way it should look on the standard display)?
Boot Camp 5 supports Retina displays, and you can easily modify the look of Windows on the Retina display after installing Boot Camp drivers on Windows. Although the article hasn't been updated for Windows 8, it's the same, so see the last two questions > http://support.apple.com/kb/ht5266