Because you can offer processing-intensive features to customers who bought the device several years ago without requiring they buy new hardware! Look at the c

Because you can offer processing-intensive features to customers who bought the device several years ago without requiring they buy new hardware! Look at the changes to what you can do with a Nest Cam, an Amazon Echo, and a Google Home compared to when the hardware was released. Particularly when you want to do various machine learn-y things on the data. Can't go retrofit 1M consumer devices with TPUs, but you can use them in the cloud.