First thing I thought when I saw the title was bullets. After reading the article, I thought this is cool, and the hard drive I need for traveling. Pretty sweet. They've got to have some form of impact reduction for the HDD though.
My Toughbook with the stock HDD can handle 10' drops, while running of course. That's a Hitachi drive. It's all in how well the enclosure is made. The HDD caddy is 1" thick made of steel with foam and gel suspending the HDD. I run SSD's in them now, so if my drive fails it's not going to be from shock and awe!