These images are not officially released by Google,so they may be real or fake. According to Download squad,a tipster (anonymous) sent a group of images to Download squad,claiming them as real Screen shots of Chrome OS.
I leave you with a couple of pictures and if you want to see them all visit DownloadSquad
My personal opinion is these pictures will be(80%) fake,because Google gives less preference to eye candiness in their applications.who knows may be Google is trying to hype their OS by leaking Screen-shots?