Glamming up a robot risks overpromising what the robot as a product can actually do. That risks disappointing customers. And disappointed customers are not going to be an advocate for your product/robot, nor be repeat buyers.
Replace “robot” with whatever you sell.
Marketing and selling is a series of promises made to a potential customer. The product better keep—or better yet, exceed—those promises.
The spectacle should be ancillary to the product—an attention magnet. The spectacle shouldn’t be the promise.