Here is a smart electric blanket that you can control with voice commands. The Sunbeam LoftTec Heated Blanket has a convenient digital controller with a backlit display but you can also interact with it from your phone. You get 10 heat settings to choose from.
This electric blanket comes with a timer up to 10 hours. Its app also supports a scheduling option. The digital controller gives you independent control for each side of the bed.