Yep. The girlf took me to dinner at The Shard in that London for my bday a couple of years ago. We visited the viewing gallery which has amazing views over London and the SE and yet nearly everyone was sitting with their backs to the windows, fiddling with Instaface or Twittergram or whatever, perhaps taking the odd selfie to record the moment they weren’t actually in the moment. Edit: I remembered I had taken a photo of this odd phenomenon