I'm not necessarily asking for better metaphors of quantum phenomena. But the opportunities or affordances of quantum computers is extremely unclear, even to experts. It's like explaining the physics of a transistor to someone and waiting for them to come up with an app design.

Taking the analogy of a GPU, how would you describe what a quantum coprocessor could do for a specialist (in, say, neuroscience or material science)? What kind of datasets would be appropriate? How should they think about what can be done with quantum processing? That's where I think there is room for metaphor development.