AI is not a bubble. It is a once in a lifetime, generation-changing technology. Think of it as the invention of internet the early 1990s. All traditional companies thought that it was just a fad and they were hardly able to find newer use cases apart from setting up a website on the internet. The AI era of today seems similar. Every major existing player is only thinking about deploying chatbots, but there is a lot of potential in the technology beyond chatbots.
Is it an invention of the millennium? Perhaps not. Can't even say it is the invention of the century or for that matter of fact this decade. But the next 3-4 years are going to be really exciting.