Seriously, if you want it to look different, just get windowblinds and you're done.
What could microsoft do better?
get functionality like windowblinds built-in and make it easy to use
incorporate ability to mount ftp drives
fix built-in defrag too to allow it to move page file so you can shrink partition to minimum size
get rid of the abysmal ribbon and change menus in office to allow typing (ie. type commands/keywords instead of browsing through menus/toolsbars)
how about improving built-in notepad to not suck ass? year 2014 and notepad still chokes while opening large files
same with ms paint, is this a joke? it hasn't changed since 1996! either improve it by adding modern features to it, or get rid of it.
get rid of IE intergrations. wasn't there a lawsuit about this
include a pdf reader that's not a full-screen piece of shit, get rid of fullscreen craps, this is a desktop os, not a phone/tablet/phablet.
how about an ability to run exes in sandboxed mode? ie. catch all file/registry access, report it, undo it.
and many more!
no, instead they're adding "eye candy"...