Two years or so ago, rumors suggested that Apple was planning to add a video projector to iPhones or iPods -- a dubious claim that flew in the face of Apple's "smaller, thinner, lighter" strategy due as much to battery drain as ergonomic and practical considerations. But third-party developers have pressed forward with tiny iOS-ready projector accessories, coming up with various tradeoffs of size, image quality, and battery consumption at price points…
