I use a projector from Brookstone. It's small and not powerful enough to work in daylight, but works fine on the outside wall of my garage after dark. It has an hdmi input, though isn't in HD, and I can watch it up to 10 ft or so diagonally with no problem. I also got an adapter for iPhone/iPad so can watch from apps.
It probably wouldn't be great if you want it for tailgating, but it works really well in the backyard in the evening, and also great for traveling because of its small size. I think it was under $300.