What changes though is only your current external situation not relating to humans is staying the same. Everyone can still continue to grow and go to therapy, learn more about themselves and the world. This is basically almost completely still the real world. Most changes a human notices is the humans around them changing, not the walls of the apartment. Relationships still evolve, breakups happen, new love can be found. Science can still continue, we can use human memory and the internet to collect and analyze data. Instead of amassing physical wealth we might amass knowledge.
But if the birth isn’t today, the pregnancy might as well not exist. I mean of course the physical disadvantages of having a big belly are relevant, but the baby isn’t, it can’t do anything, it will never be born