We'll probably see more diversity soon (not just "wrappers of OpenAI"), but for AI and LLMs in general I think we're just getting started; this is something like 2008 for smartphone apps. I think it'll be a decade at least before this new market gets saturated and the wave dies down to make way for the next thing (and that's assuming the fundamental tech plateaus and doesn't lead to AGI)
Best to buckle up and get familiar