What do cell phones look like in the year 2144?
Obviously they won't have a screen anymore. They'll be pop-up displays. So if you're sitting on a train and your romantic partner sends you a steamy selfie...guess who has an audience?
Has this annoyed anyone else?
If they're tactical screens, that makes sense. But I still don't think transparent displays on personal devices will be a thing in the future.
It's far more likely it's displayed directly into your brain.
I mean, we're talking about 121 years from now - enough time to go from the telegraph to VR multiplayer games played by people from 5 continents over a worldwide network: it kinda seems logical that some kind of direct brain interface tech (for which there are already some very early stage things) will have been developed by them.
It's very simple. The ad gets into your brain just like this liquid gets into this egg.