I bet you can’t reach the wall switch for the basement lights from your bed after you turn in and realize you forgot to turn them off.
I don’t have many IoT things in my house right now, but I do like my doorbell camera. Just yesterday I was was sitting at work, received a notification that someone was on the front porch, watched the video, and was able to tell my daughter to bring the grocery delivery inside. Knowing my daughter, if I hadn’t it would still be sitting there 3 hours later when I got home from work.