Odds appear good that Apple will be joining Amazon and Google in the smart speaker competition with a Siri-powered device it plans to introduce at WWDC next month. The new home-AI product reportedly will have excellent acoustics with one woofer and seven tweeters, and the processing power of an iPhone 6. Its price tag likely will be higher than Amazon’s Echo, which sells for $179. The speaker may have a camera, and it likely will control other devices — locks, lights, appliances, curtains and such — by voice commands issued through Siri.