Indian Geek Develops 'Sixth Sense' Device

couldnt understand the concept and its benefits..are we saying we will not be needing keyboards and they will be replaced by the virtual screen? can i work from anywhere? lets say have a camera in home and i am travellign to the office..using mistry's tech will i be able to click picture from the camera...should i keep the camera open?...i might be sounding very critical or naive but to be frank i am not quite clear on what is being tried to sell and how futuristic this thing is...i remember seeing virtual keyboard in discovery channel some 8-10 years back where using lasers a virtual screen could be created