DLP projectors. The ONLY way to get an image 140+ inches but yeah, there are many drawbacks. Not to mention the fact that you have to have a pretty dark room to be able to see the image properly. I know the units with 1400+ lumens are quite good under normal conditions but still....
Another drawback is that you have to have a perfectly flat, smooth surface in which to project the image.
Another drawback is that you have to have a perfectly flat, smooth surface in which to project the image.

