BrainBank: That Is Almost a Lightsaber Edition

I saw this a couple of minutes ago at about twenty to ten, and was instantly intrigued. While the execution looks a bit unwieldy, the concept is undeniably cool. Essentially, for those of you that haven't watched the video yet, this is a pen that reaches into the screen in order to create some interesting 3D drawings.

Also, it totally looks like a lightsaber when fully "extended." In point of fact, rather like the lightsaber butter knife from the Family Guy Star Wars special.

In all seriousness, this seems like it might lead to some very creative applications, which I'm down for. New ways to interact with electronics never go unappreciated (except for the Virtual Boy. That thing was doomed from the get-go).