Making home infrastructure smart has plenty of utility, beyond simple laziness.
A smart thermostat connected to other home automation can know when nobody is home, automatically switch to energy saving mode, and then be notified when a resident is heading home so it can enter recovery mode and be back to a comfortable temperature by the time you arrive. Same goes for water heating -- if nobody is around, water in the storage heater tank can be allowed to cool down, and then brought back up to temperature before it is needed.
Speaking of hot water, having my own "smart meter" and monitoring allowed me to detect when the water heater was failing (energy use increased significantly), long before it stopped working entirely. Keeping track of power consumption by the AC system and fan can tell you when a filter is clogged or if a pump or fan motor is failing. By monitoring water usage (flow rate), you can detect plumbing leaks as well as notice when a hose is left running.
A one-way-feed out from an alarm system can be useful. If an alarm is triggered in the basement or first floor while system is "Armed-Home", then all lights on only that floor are turned on at full brightness. If "Armed-Away", all lights on all floors go into full disco stroboscope mode, and outside lights start blinking slowly on and off in the traditional S-O-S pattern. You can literally have an air gap between your alarm and home automation by using a photodiode to read the alarm LED state if you want to be paranoid.
My next step is to install powered insulated window blinds that open on sunny winter days for passive heating, then close at night to keep the heat in, and a UV sensor that closes the blinds on really sunny days to reduce UV fading of my furnishings.