Optoma's Pico wins the beauty contest. In fact, there is no contest. The sleek, black-metal case with silver trim looks like it came, if not from the future, then at least from the present. At 2 x 4.1 x 0.7 inches, it's 30 percent smaller than the already tiny 3M model, and at 4 ounces, it's 1.6 ounces lighter. Yet that tighter package makes room for a handy extra feature: a little half-watt speaker. Though feeble, at least it takes the Pico beyond the days of silent movies. (The best plan with either projector is to plug headphones or speakers into the video source, such as an iPhone.) But Optoma doesn't include a VGA port. The only input (also present on the 3M) is a composite video plug for devices like cameras, camcorders and iPods or iPhones (an adapter for Apple's handhelds is included). It's useless with most laptops: Only a handful have composite or S-Video ports.