They were "simulated," but they were actual images on a screen, and that will be the case in production. Those will also be simulated since they won't be actual pictures of the lanes. Demonstrating the production software, or the software in a development phase requires a simulated video in order to have the icons in the right places at the right time, the right messages popping up when needed, etc. So it would be simulated images even if the software is ready, and that would be the case at an early design stage. Nothing meaningful can be read into the message except that they aren't pictures of actual cars, there was no inattentive driver, tired driver, etc.
There's also the matter of how helpful they are. In a Tesla, they are quite helpful. In a Lucid, there are intelligently placed side view camera displays, blind spot indicators, and a lot less reason to need the display. I'd welcome it being there but I'm not in a rush.