Tesla's self-driving robotaxi will be fully electric and cost under $30,000. Musk also revealed humanoid robots called 'Optimus' that could perform menial tasks and offer companionship. Meanwhile, the lawsuits allege that TikTok's addictive design features, like endless scrolling and push notifications, harm children's mental health. Meta has introduced AI tools called "Meta Movie Gen" for automatically generating, editing, and adding sound effects to videos.