This should be banned. Really. I don't want this on the same road as my loved ones. When you are driving, you are driving. Not reading/tweeting.
Even more, mounting "something" to the front window is illegal in a lot of places in the world [1]. At least Netherlands and U.S. In The Netherlands operating a phone while driving (voice operated carkit exempt) gives you a ~$250 fine.
Furthermore, obstructing part of your window is dangerous. You could miss something. And it's distracting (our eyes focus on motion).
What a idiotic idea.