AnimeMania :
This is a physical object right? Something that can be lost, stolen, destroyed, etc. Issued when you are a baby, to be held onto until the day you die. I don't see how that would create any problems. Every computer in the future will now be manufactured with this legacy port that this security key fits into.
You mean like the US social security card? I can't imagine how they would ever have a replacement process for something like that... The US should be providing USB key fob certs for their citizens. Smartcard might be nice but at this point, every computer has a USB port.
Sure, USB may eventually not be backwards compatible or just go away entirely. Companies already make adapters for all types of legacy ports that convert to USB. I would assume that what ever replaces USB would have an adapter for legacy USB devices.