We've been hearing about quantum computers for a long, long time. This is the first one demonstrated. While not having the optimum configuration, it is still light-years ahead of what we have now.
Encryption of any sort will not be safe from these machines, unless we encrypt on quantum computers and even then the safety of encryption is not clear at all. So, while I am wowed by the "gee-whiz" factor, I am also afraid of devices like this in the hands of governments and other uncool types. That will happen, too.