They are the digital download versions with the new Lucasfilm logo (at least ESB and ROTJ). SW/ANH starts out in 2.35:1 for the crawl, then it switches to a 16:9 crop. For some reason ESB and ROTJ have the crawl cropped too.
Yea I noticed the lucsfilm logo and no 20th century fox logo, strangely I noticed a lot of pixelization during action scenes, btw are they cropped more than the blu rays and other digital releases ?