Remember the old days? Back when I was part of a corporate team teaching project management, we hauled in our presentations in milk crates--about a dozen of them for a five day class. We needed a van to haul them around.
In the nineties, overhead projectors were gradually replaced by the "modern" LCD projectors that initially cost many thousands of dollars, and required an oversize rolling suitcase and a strong back to lug them around.
They are now as common as dirt. Everyone has one. But after years of promising, the industry appears to be finally delivering the latest round of projector technology: the pocket projector. Which will likely spawn a lot of really bad jokes.
But I predict these will fly off the shelves, even though this one only has 640x480 resolution. These will really take off when someone is able to cram SVGA or XGA resolution into one. One thing I really like is the direct iPod interface. You could load your presentation into iPhoto as a series of PDFs, transfer it to your iPod, and then show it as a slide show. Salespeople will love these gadgets.