You may not be able to mount Optoma's BigVizion rear-projection display on a wall, unless you build a wall around it, as shown in this Optoma PR shot. But that may be worth it for the size: at 100 inches, Optoma says the DLP unit is the world's largest 1080p display. And you know what? They may just be right. Of course, at $20K, it had better be big, especially with LCD and plasma prices continuing to plummet. So, let's say that again: 100 inches. $20K. Heck, that's only $200 a diagonal inch. A veritable bargain, no?