I’ve reviewed more than a few projectors, and I’ve discovered they are not a “one size fits all” kind of gadget. Unlike flat screen TVs, which all basically look alike, projectors vary in size and features, and before you buy one, you need to ask yourself some questions about your needs. Is the projector going to be mounted permanently in a home theater? Do you need one for meetings at the office? Perhaps you travel a lot for work and need a projector that’s easy to pack in a briefcase. Today I’m reviewing the Dangbei Atom smart home projector ($899 from dangbei.com or Amazon). Early purchaser…