IOActive's findings enable a very difficult but devastating man-in-the-middle attack against anyone buying or storing these locks. It's really hard to clone a key to these locks, but once that's done the lock can be reassembled, and the attacker can use the copy to open it.
It's NOT like you can walk up to one with a thumb drive and pwn it.
IOActive's findings allow an attack where you can obtain one sample of the lock and gain the master key for the entire lock system.
So you walk up to the unguarded bike shed, take your time chopping off the lock with a hacksaw, and now you have access to the storage area. Normally the guard would come around before you'd be able to cut off that lock, but since you now have a key it's much quicker, and you wouldn't look suspicious to the guard anyway.
It's NOT like you can walk up to one with a thumb drive and pwn it.