The "art" design of the invitation may be a red herring. Remember the "in the air" posters before the MacBook Air announcement?
<a href="http://www.wired.com/gadgetlab/2008/01/macworld-theres/" rel="nofollow">http://www.wired.com/gadgetlab/2008/01/macworld-theres/</a><p>They sparked all sorts of speculation about WiMax devices and wireless streaming.