Too many people on here are making a big deal out of nothing. There isn't really even anything negative about his comment; he just disagrees with Microsoft's approach. The man is a developer, so some replies posted here about gamers being able to choose how they play the game--kinect or controller--do not make sense. From a developer's point of view, he clearly doesn't like the idea of being eventually forced to incorporate a control mechanism like kinect into his future games. Since Sony likely isn't going to force the issue, their developers can decide for themselves whether or not motion control makes sense for their games. That's it. It is in no way negative.
Most readers are just trying to find something potentially negative about the comment, simply because it was posted by a person working for a rival company.