Top comment says it looks like the roads now come with water pipes and electrical cables integrated, which is so cool! No more citizens complaining their house has no water. Plus it's more realistic.
I'm also stoked that it looks like you can now make dual highways/bridges all at once instead of laying down one direction and then trying to match up the other side. That was always annoying.
I'm really excited for seasons too. The creators also seem pretty proud of that one, so I imagine they've put a lot of heart into that feature.
It just makes so much sense! No more annoying power lines or water pipes - unless they are actually needed.
I'm so excited for the more realistic simulations. I watched two dollars twenty who did a video about building the city for the trailer and he said that the day / night cycle, weather and seasons were all so beautiful he didn't even turn them off. That's the kind of game I want to play.