Sometimes, you’re in bed and the glow from your smart ring’s optical heart rate sensor creeps into your peripheral vision. It got me thinking about how Samsung (and potentially Apple) will join the smart ring market, and why that’s a terrible idea. You see, these companies want devices that make their presence known in your life, embedding themselves in your routine. But smart rings blend into the background on purpose, which limits how much you can, or will want, to do with them.