problem could be solved in 1 second that would take present computer 10,000 years

A quantum computer would be able to solve in one second a problem that could stump a traditional computer for 10,000 years, according to Hartmut Neven, director of engineering at Google"
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Advancement in Fredkin gate termed as big leap for Quantum Computing

I'm thinking that you would finally be able to synthesize intuition in a Quantum brained sentient robot. This likely would act and seem more like a human being than the ones we presently have and their brains would be quantum computers with little light rays dealing with qubits.