What was showcased:
New Autosave: Will automatically save your game to a save file named "Autosave", you can choose to turn it on/off and also choose if you want to be notified when an autosave happens.
New Building: A new business in 1.3 (will be revealed later on what it is)
New scenery: More trees and other nature/scenery objects have been added.
Update 1.3 is set to release in November of 2023.
That's it for now, stay tuned for Sneak Peak #2.