Amazon.com Inc revived speculation about its next major product on Wednesday, using a mysterious YouTube video and website post to tease a June 18 launch event in Seattle to be hosted by CEO Jeff Bezos. The 50-second video posted by Amazon featured people staring downward at something just off-camera, moving their heads from side-to-side to try different vantage points and making comments like Its very real-life, and I dont know how you guys do it. Amazon would not elaborate further. The Wall Street Journal and several tech blogs report that Amazon may be working on a phone with a three-dimensional display.