You can extend this application by adding Voice Command. Extension scenarios could be--say out a command to display a TV and your holographic app download and display the TV. You can perform tap and place to move it, however you can remove the object or add to cart using Voice Command. You may wonder how the voice command will work when there are multiple objects. In that case, you can find out which object is gazed when the Voice Command was raised, and based on that, you can take action.