Typically we watch movies on a 120" diagonal pull down mounted to the side of the house, but I had an opportunity to borrow a 9'X16' inflatable from work so why not. The monster just barely fit across the side yard. I built a multi-compartment hush box for the blower assembly which made it acceptably quiet, though you can still hear the thing whirling away when the movie is silent.
I upgraded speakers in my home theater recently so the old ones have come out to serve admirably in the yard setup. Coupled with a 10" Paradigm sub (DSP3100 I believe) the sound is surprisingly clear and dynamic. An old amplifier from the '70's completes the audio end of things.
The projector is my BenQ W1070 drug out of the home theater. Even though I just installed a new lamp it could have used a few more lumens for that monster screen. The picture was still very watchable.
Zero gravity chairs are perfect; comfortable and just the right angle.
A friend brought over San Andreas. Not my favorite but a fun outdoor popcorn flick all the same. It's a good thing I have tolerant neighbors because that movie is noisy mayhem from start to finish. Helps that I gave them a heads up before hand and shut it down by 11:00 on a Friday.
It is a lot of work setting up and taking down an outdoor theater but worth it. Watching a movie outside just has an entirely different feel.
There are down sides of course; the potential of annoying neighbors, up here in Canada it gets dark late (9:00 to 10:00) in the summer, and in my yard at least, the freaking crickets make such a racket that they compete with all but the loudest scenes.