There was a significant improvement regarding the Retina screen (Hi -Res) .
But Windows does not push publishers in this direction to develop their applications in High DPI . Two problems arise : the scaling and blur police.
I must say that OS X has the expected thing .
IE 11 can correctly display the Retina , Firefox Beta also . Chrome Dev is still work for high- DPI displays .
I would also say that it is more fluid.
The Windows Store app has been entirely revised .
I hope that Windows 9 will be completely redesigned for Retina displays for the desktop display is not suited to me and some parameters are still unclear .
Modern UI is only successful but I do not often use this interface because there are not enough interesting applications developped and features are limited so use quickly becomes limited to a PC .
Finally , I hope that Apple will update BootCamp (and its iTunes software ...) to users of Retina screen . Currently , police are unclear.