A really excellent block of ice, so you can make it an ice pick for those who invaded your house, and set Alexa to play off beat scary music, and movies when they entered, dim the lights and change them to a off tone chrinsom color, and an intelligent person behind of all that. For about everything else, I would say an app for doorbell, and ontop of that a few of those drones for security. A flash gernade for non smoke detectors, ontop of that.. Well basically what you will have in mind with your cellphone, tablet, et all.
Sorry for getting that evil anyways.. Oh well I better just chill out in the porch.