Well if you put your hard drive in one it should be safe from a EM Pulse
"Hmmm, quite interesting, but it all begs the question "What will these little gold cages actually do?"."
Well, to be fair, it's impossible to say at this point. However, buckyballs have been around for a long time, and they are manufactured and sold. They do have some uses---the problem being that they are incredibly expensive---which makes their applications extremely limited.
Offhand, it seems like a gold version would be more expensive but I'm not sure how much more. I have a feeling the labor will be the main expense.