There is one important thing to know about Apple’s big move this week into artificial intelligence: it’s not here yet, and strictly speaking it may never be here.

On Monday, US time, Apple announced dozens of new AI features for its phones, tablets, virtual-reality headsets and PCs, including a long-awaited overhaul of its Siri voice assistant, new ways to handle incoming emails and write outgoing ones, and new ways to generate, find and manage photos on Apple devices.