Smartphone innovation has largely slowed to a crawl over the last few years. We’re long past the days when each successive generation of phones offered up features that drove waves of excitement among consumers, who would then wait outside the Apple Store. But that might be about to change thanks to artificial intelligence. At least, that’s what smartphone makers hope. Yes, we’re about to enter a new phase of smartphone sales spin. Prepare yourselves for the great AI smartphone war. To be fair, smartphone makers have been adding AI and machine learning capabilities to their devices for years — for...