Currently there's a few more in the pipeline (including silicon) that lead market forecasters to predict the long-term (think 2030) trend will continue.
The downhill road of pricing has had some bumps but it's very assuredly, extremely downhill
There's giant periods without any movement. Batteries have been around for centuries for instance.
These model can be a bit imaginative at times and nuclear may start its journey on it any day but so far it doesn't look like it has.
I'd love something absurdly cheap like a working Ponz-Fleischman bubble fusion to come around but if I was advising say a $100 million fund I'd say "solar + wind + chemical batteries" is the foreseeable future. It's just the reality.
Personally, I see more risks to massive-scale battery production than to modest-scale nuclear fission, both of which solve the same problem.