Optoma HD31UST projector

Optoma makes top-class projectors, and at first glance the Optoma HD31UST looks like another clear winner: a bright 3,400 lumens rating, keystone correction, and ultra short-throw projection to boot.A large part of the appeal of home projection is getting to see your favorite movies, programmes, or sports matches in a big way, and the HD31UST is able to 'throw' images onto a wall on 30cm away, with an improbably massive 100-inch projection even at that short distance.But why would you need a sho