Amazon's Echo lineup, like some smart speakers, uses proximity detection to decide which device is best-suited to responding to your voice commands. It's a clever way to prevent multiple devices from waking up at the same time. There's just one problem: support in non-Amazon devices has been inconsistent at best, creating a mess if you have third-party gear that doesn't use the feature. Thankfully, that shouldn't be an issue from here on out. Amazon has moved its Echo Spatial Perception technology to the cloud, ensuring that all devices can use it.