Request for the hivemind

I'm looking for more examples of things/breakthroughs that are always 'imminent', e.g. predicted 'within the next 5/10 years', but thus far have not happened

So far I've got
- Nuclear fusion
- Quantum Computing
- Self-driving cars
- Canaverro's head transplant

@Garwboy Carbon capture (on any sort of useful scale), and - in recent years - "AGI," Artificial General Intelligence (which I suspect is likely to remain "imminent" for the foreseeable future).