I've wanted an applicable use of something like this from UWB (UltraWide Band). Apple is really well-positioned for this, but nothing has yet come to fruition.

I've wanted an applicable use of something like this from UWB (UltraWide Band). Apple is really well-positioned for this, but nothing has yet come to fruition. If devices like HomePods — or ideally, something much more affordable — placed around your home can begin to triangulate you based on a wearable (phone, watch, tag on a collar, etc.), then some really cool possibilities become imaginable.