Quantum computers are real and they're already in use, D-Wave has a hybrid quantum-classical system that has been sold to various titans including Google and NASA. Pure quantum computers systems are right around the corner. The implications are that encryption could become obsolete.
http://www.pri.org/stories/2016-03-29/scientists-just-created-holy-grail-computing-first-quantum-computer
http://www.theregister.co.uk/2015/12/09/googles_quantum_computer/
http://www.newsweek.com/quantum-computing-breakthrough-paves-way-ultra-powerful-machines-440444
http://www.pcworld.com/article/3044988/this-new-discovery-could-put-quantum-computers-within-closer-reach.html
http://www.ibtimes.com/quantum-computers-move-closer-reality-fredkin-gate-breakthrough-2344047
Thats not a quantum computer:
https://en.wikipedia.org/wiki/D-Wave_Systems
It just uses quantum annealing to go around the bits fast enough to emulate the superposition, but it doesnt uses qbits.
At this point, quantum computers are pseudoscience.
But quantum enhanced computers might be possible.
Look at the critics, it's probably a scam:
https://en.wikipedia.org/wiki/D-Wave_Systems#Reception