People are confusing LLMs with AI.
There are different types of machine learning that aren't language based, nVidia's chips are Machine Learning hardware, not LLM hardware. Currently the AI trend is for LLMs which absolutely have a limitation and that bubble will burst. They won't go away, but they're not going to be 'THE' AI models we use.
AI involves things like Self-driving cars (not LLM), Image and Video analysis or generation (not LLM), coding generation, mathematics processing, physics simulators (not LLM).
OpenAI and Anthropic might disappear or get bought out by an AI company that does more than LLMs and they'll just become a small UI part of a much larger AI or AGI model. But all those other types of machine learning still need hardware to operate on, and nVidia's chips are still the best for that task.