Surface Tablets VaporMg Casing

Microsoft made a point in their Surface tablet presentation to bring attention to the tablets casing, VaporMg. We are told it is pronounced Vapor-Mag but what is it and why is it so special?

According to Microsoft the casing is created by molding metal and depositing particles that creates a finish similar to a luxury watch. Using magnesium, parts can be molded as thin as .65mm. Much thinner than your typical credit card but lighter and stronger.  The end result is a 10.6" tablet that weighs in at 32 ounces.

Combined with the Corning Gorilla Glass protecting the front of the Surface tablets and VaporMg casing protecting the back side, these tablets appear to be Lumia tough. I just wonder when we'll see the first video of someone driving a nail with a Surface tablet.