A 50-inch picture projected from a Pocket Cinema Projector?

About a year ago, a tsunami of pocket projectors prototypes started to pop up. Now it’s time for commercial products. the Pocket Cinema makers claim to be able to project a 50″ picture from this little box. I’ve seen similar products and while some can really reach this size, they usually have serious limitations when it comes to brightness. If someone tries it, please drop a comment. (about $500 at firebox)