Raising blinds, turning on/off lights, and unlocking the front door. It is convenient since I can do all those things with one command (raise all the blinds and turn off all the lights, or raise all the north blinds and lower the south ones), it would be a hard problem to create physical buttons to do what we needed without running around the room to hit various switches.

Google can also do this. Alexa has lots of problems, but it can raise a blind in a pinch. We also spent a ton on Lutron shades because we discovered that we were just managing them too much manually (Siri then is great for controlling that).

You can also ask Siri the weather in the morning, useful in figuring out how to dress the kid.