Carbon capture seems like a bigger wildcard to me than battery technology. Battery technology has been improving pretty steadily and will likely continue to do so.

Capturing carbon from coal power plants adds cost to something that is already not cost effective. Capturing carbon in the atmosphere likely will require huge amounts of power - and if its not 100% renewable power its kind of pointless.

Nuclear is better than coal or natural gas, but there have been some high profile failures lately and the lead time on new nuclear is so high, as well as the sticker price.