Tech legal expert Eric Goldman wrote that a victory for the plaintiff could be considered “a dangerous ruling for the spy cam industry and for Amazon,” because “the court’s analysis could indicate that all surreptitious hook cameras are categorically illegal to sell.” That could prevent completely legal uses of cameras designed to look like clothes hooks, Goldman wrote, such as hypothetical in-home surveillance uses.
There can be reasons why you might want more subtle cameras, but I struggle to think of legitimate reasons why one would want ones designed to only look hidden in closets and bathrooms.