I wouldn't equate solid state batteries with fusion power. Solid state batteries do exist and work well, they are just very expensive. Meanwhile fusion power is still entirely within the experimental stage and there are no fusion plant prototypes that can produce power at any price.

It’s always 20 years away until it isn’t. Self driving cars are…I guess they are here already. AGI? Well, we have to move the goal post on that constantly.

Solid state batteries seem to work, but the price of prototypes is very high. Samsung says they will soon be shipping earbuds and watches with solid state batteries, but the cost is too high even for phones. Xaomi showed an $800 phone battery. Mercedes has one prototype car with solid state batteries. Honda has one motorcycle. EHang has one flying car. Nobody seems to be past one-off demos.

Add Affordable at the start of that sentence and it's accurate.

Solid state batteries and fusion might in the end suffer from a similar economical problem. That they turn out to simply be too expensive.

Does look as if ssb are close.. Esp Japanese ones.