The Future Is UWB
The newest iPhones 11, 11 Pro and 11 Pro Max are apparently the first mass produced computing devices to feature Ultra Wide Band receivers. Until I read this, the rumour has been that it's for more precise physical location tracking for a Tile-like competitor. To which I shrugged my shoulders, cool tech but nothing to raise too much fuss over.
That assumption was premature and naïve. I first read Jason Snell’s take after an interview with an UWB industry insider which before coming across the linked piece by Steve Cheney. Now my mind has changed. If half of what's said here comes to pass, then we're in for a wild ride over the next five years.