I've been working on an Augmented Reality prototyping-presentation tool in both B2B and B2C flavors. Originally, it was made for book cover designers, authors, and publishers, but I already had requests from product designers, so it's worth mentioning it! Basically, instead of sending to the customer a flat mockup, we send a frictionless URL link where they can place the design over their desk, and get a more educated quick approval, be it a book, a package, etc.