It is a nice feature to be able to center the homescreen if you are laying down.
Just far more relaxing if you ask me.
Only problem is that is totally fails for the non VR apps like Skybox.
I can start Skybox, then sit up to select what I want, start the video, drag it up and only then I can lay flat again.
Head tracking is good thing most of the time, but sometimes I wish I could just lock the entire screen where it is and with no reaction to my head movements...
Would make watching nrmal and 3D movies so much nicer....