Here I am genuinely curious as to what Noctua, a company that specialises in making fans, is cooking up. Over on the company's official X account, the company has teased "something new is coming…" with a short teaser video showing what it might be. From that, it's not entirely clear what we're looking at, but it's certain not to be one of its usual beige and brown fans.
From the video it's clearly a product with more coverings and curves than a usual case fan, though there definitely is a fan included.