Holding the "remote" in your right hand, you can easily rest your hand on your thigh. Unless you have a massive projector screen or like to sit an inch from the telly, you're not going to need to move your hand much. You can try with any telly remote. Point at one corner, then the opposite. The movement is about the same as using a mouse, and you still get your horizontal support provided by your thighs.
Hard to really say much more without getting our hands on one.
Hard to really say much more without getting our hands on one.