now it might not be a "true" hologram, but its good enough! and ya dont need any shitty goggles. http://www.youtube.com/watch?v=mm9IQ7MTS08
You can get planar projectors as well, but I can never remember what they're called. Ah found it: http://www.youtube.com/watch?v=cfSHLrHrlAY&feature=related Wikipedia calls them free-space displays Been around a while, but quite cool I thought. They go much bigger than the 3d ones, although that is the first 3d one I've seen that didn't use the spinning mirror method.