Most of these inventions don't live up to their initial hype, but some do find a niche (for example cell chemistry optimized for large temperature ranges, optimized for certain safety features, longevity over charge density etc.), and ideas from some of them find their way into mainstream batteries after a decade or two.

It basically never happens that a new cell chemistry becomes the market leader in all areas, but all in all, batteries to get better and cheaper at a remarkable rate.