This just seems like a stop-gap solution before the true solution which is wearables (or Amazon Echo/Glass). Saying the name of what you want to buy into your

This just seems like a stop-gap solution before the true solution which is wearables (or Amazon Echo/Glass). Saying the name of what you want to buy into your smartwatch/glass/echo is going to be a lot more frictionless and scalable than putting these buttons all over your house.