What major announcements did Google make at I/O 2026, its AI-focused event?

Google launched Gemini 3.5 family of AI models, which are 4x faster than their competitors, along with Gemini Omni, which can create videos from any input type, at its AI-focused I/O 2026 event. It announced Antigravity 2.0 and Gemini Spark, its own 24/7 personal AI assistant. Google launched AI-powered Search, with the biggest upgrade to Search box in 25 years.