Quantum hype will not replace AI hype. Quantum has already had its time of overblown expectations and has cooled off to realistic expectations. It won’t be cool or hyped again until general purpose quantum computing becomes a reality.
Which, to be clear, could be never. Aside from factoring numbers, solving certain optimization problems, and simulating quantum systems, there are very few known applications where quantum computers even theoretically outperform classical computers.
Of course, it's possible that as quantum computers become more powerful/robust, it will inspire discovery of new classes of problems/algorithms that they excel at. But I'm not holding my breath.
I am talking about the 70s.
AI has cooled in the past, even generating the term “AI winter,” but it’s hot now. Quantum could be big again, but this current wave of specialized computers is played out. There won’t be hype at the level that AI currently gets until there is general purpose quantum computing.