First, that Xbox One is a DRM Box. While Microsoft can lie and say it's up to the Publishers, the DRM is the actual box itself.
Second, Kinect!!! They say it can be turned off, yet still must be connected to the Xbox One. Also if they PS4 and Xbox One releases at the same price, you'll be buying a console that has a much weaker GPU but you get the Kinect. Bad trade off imo
Those are the 2 big ones.