When Google first showcased its Duplex voice assistant technology at its developer conference in 2018, it was both impressive and concerning. Today, at I/O 2024, the company may be bringing up those same reactions again, this time by showing off another application of its AI smarts with something called Project Astra.The company couldn't even wait till its keynote today to tease Project Astra, posting a video to its social media of a camera-based AI app yesterday. At its keynote today, though, G...