Step-free access, everywhere, by default.
Pedestrians and cyclists given actual priority over cars and other big metal boxes at every point. Free trains for everyone.
Food delivery that works kindof like milk delivery: re-useable glass containers with recyclable foil lids.
Better access to 3D printing of medical gear like splints.
Sunbeam City is a anticapitalist, antifascist solarpunk instance that is run collectively.