I don't know about residential. Seems mostly to be a plaything. But there is big potential for this in industrial settings. Imagine being able to monitor machi

I don't know about residential. Seems mostly to be a plaything. But there is big potential for this in industrial settings. Imagine being able to monitor machine uptime around the clock by sensing amperage usage. Tracking cycle time by counting cyclic spikes in current and putting it on a live dashboard. Detecting motor degradation by sensing increases in amperage required over time. Calculating energy consumption per pound of commodity part produced.