Digital is a framework built on top of analog. Boolean logic is the foundation of all of our modern computing, and so we built all of our circuits around the ability to handle HIGH and LOW signals. What your describing seems to me like you're saying that leveraging an analog signal is the benefit of quantum computation. If so, I don't really agree. If not, then I misunderstood.

Either way, I suspect that the superposition between the change in value and the change in time, in relation to all of the other superpositions in value/time changes, is the true computational power of quantum technology.