I opened the ABC app on my iPad today and a Modern Family episode caught my interest. It was the "Airport 2010" episode, which aired on May 5. Not a bad show, by the way. At one point during the episode a character gets a text message and checks his iPhone. I saw an iPhone that appeared to have a flat, glass back in the few seconds it was on-screen, so I rewinded it and checked again. There was the unmistakeable metal frame. I paused it and took a screenshot on my iPad: I'm surprised that this is the first mention of it I've found. It seemed unlikely that Modern Family would air an episode with the iPhone 4 in it a few month before it was even announced, but I can clearly see the iPhone 4 in that episode. It's surprising that nobody noticed it.