Apple (AAPL. O) is planning a comeback in artificial intelligence with an ambitious array of new devices, including robots, emulated Siri, smart speakers with displays and home security cameras. Desktop robots, which serve as virtual significant others, are at the heart of the artificial intelligence strategy, with the goal of launching in 2027, according to people familiar with the matter. Meanwhile, smart speakers with displays are expected to hit stores next year, Apple's foray into...