Someday, somehow, quantum computing is going to change the world as we know it. Even the lamest quantum computer is orders of magnitude more powerful than anything we could ever make today. But figuring out how to program one is ridiculously hard.
As this fantastic animation from PHD TV explains, the true power of quantum computers comes from qubits, which have way more states than standard binary bits. these states can translate to raw, compact computing power. But the downsides are big too. Even looking at a quantum computer while it's working can screw everything up. Just imagine trying to debug that code. [Quantum Frontiers via Hacker News]