I know everyone has already mentioned smart home, but to drill down a bit more, I think smart appliances will be more of a thing. The refrigerator where they can see what’s in it from the grocery store, the oven they can start preheating on their way home, a w/d that is one unit so that it can start drying/steaming after the load is washed…these kinds of things. I also wouldn’t be surprised if each apt will have their own locker outside the door for packages, including a refrigerated locker for grocery deliveries.
People are moving toward convenience all the time, so people in apartments will always want things that make life more convenient for them. We already have autopay for rent and online signatures, maintenance requests, and smart locks, light, and t-stats that can integrate with Alexa. Why wouldn’t smart appliances or remote blinds or smart audio be next?