http://www.widescreenreview.com/news_detail.php?id=20074
They claim they can use lasers to produce 4K projectors with up to 72,000 lumens. It is optimized for 3-D, but I am sure it does 2-D very well.
Will this technology trickle down eventually to a home projector that puts out an honest and long lasting 8,000 lumens?