That's security through obscurity. All existing techniques have been attacked (eg. keyloggers now take screenshots to defeat the silly pull-down menu "security"), so it's only a matter of time before they start capturing USB output and using it to attack the account in real time.

What's wrong with a key fob displaying numbers with no physical connection to the computer?

Edit: The first UK retail bank to offer this as standard would definitely get my custom. I'm quite serious about that. Also drop "VerifiedByVisa" nonsense at the same time and replace it with similar real security.