Honest question: Has Apple ever actually dropped such subtle hints in their posters for WWDC / MacWorld? I've seen many people read between the lines of these images over the years but haven't seen anything come of it.
Several times for both WWDC and for things like the iPad, iPad Mini and iPhone events. They havent been to macworld in quite awhile, so I'm not sure if they did it for those events or not.
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Overhead position of the sun, during daylight. At night, by what was showing on TV.
Couple more like this we might make you co-winner with the embarrassed guy.