The watch communicates with the iPhone over Bluetooth — and Wi-Fi, which is something Android Wear watches can only dream about. So even if your phone is out of Bluetooth range from your watch, as long as both are on the same Wi-Fi network the phone can still be the comm center for the watch.
And here’s a surprising feature that Apple hasn’t said anything about previously: When the watch is in a known Wi-Fi hotspot, the watch can perform the most essential online functions even when your phone is completely dead, turned off, or absent. It can query Siri, for example, send and receive texts, and send/receive drawings and tap patterns to other watch owners. That’s impressive.
Pogue’s reviews are a must.