Apple’s Siri voice a**istant has a new look and a new brain. | Image: AppleVoice a**istants hold so much promise, but in the decade-plus since Apple’s Siri and Amazon’s Alexa first wormed their ways into our lives, their most compelling use is still setting timers. Competition from Google’s a**istant (and if we’re being charitable, Samsung’s Bixby) failed to light the spark of innovation in this space, and in many ways, voice control has regressed. These a**istants regularly misunderstand, mishear, and sometimes just don’t listen at all. They’re a far cry from the proactive, actually smart digital a**istants they were originally pitched as.Enter generative AI: the technology voice a**istants need to transform them from novel to necessary. This week at its Worldwide Developers Conference, Apple announced plans…