Not exactly 'quantum' computing but damn close. Therein lies to problem; they're dealing w/ wave packets so small that they're brushing up against the realm of quantum uncertainty. They're still magnitudes away from significant 'fuzziness', but in precision computing those small variations will cause issues, not to mention plain ol' classical wave interference from all sorts of external radiation.
And for full benefit, all other connected circuitry would need to be of the same technology. The chips may fly but all the attached hardware would just get bottlenecked.
I'm casting too many aspersions on a good idea, but keep in mind mainstream chip makers have at least a decade or more of shrinking (i think the theoretical limit is 18nm?) and many more of core multiplying. They might be researching some crazy stuff but for the foreseeable future we're still gonna be using transistors the basis for our computers.
Of course, I'm probably wrong. If someone can make it, someone else will sell it. And when it happens no one will be happier than me