All speculation aside, doesn't pretty much any new technology have the potential to be "scary"? New cell phones mean smaller monitoring devices, new alloys mean new weapons... I can't think of many advances in technology that couldn't be turned to bad ends with the right attitude.
Also, I suppose it would be really unpopular of me to point out that a TON of research and breakthroughs have been funded by a military of some sort or another. We've been motivated to come up with some pretty clever ideas when faced with defending something we love--or taking it from someone else.
In reply to: "Invisibility cloak on the horizon, scientists say"
August 12, 2008