Could AI usher in a new era of wealth where nobody has to work? Sure, if you ignore the fact that the most likely scenario is that the value is captured by the current owning class, which is already well underway.
On the flip side of possible scenarios, could AI start improving itself and lead to an upward spiral of improvement? I can entertain that idea, but I think we'll find that most types of AI innovation won't engineer themselves outside the box that is market need and product-market fit. History has proven over and over again that innovation for innovations' sake gets a few moments in the sun before being quickly forgotten if it doesn't have actual utility.