Commercial fire alarms, since we already have a pull station. Why not include the strobe lights and audio effects that occur when a fire alarm is pulled? These would be able to placed on walls, or on the ceiling depending on the model.

Additionally, since we also have the more residential smoke alarms that were just added, why dont we have them all connected to each other and things like burnt food in the oven create smoke which sound the alarm to all connected smoke detectors placed in the house.

This would make these items a lot more useful and realistic. As well as add a new role-play aspect for things like school fires.