This week in AI: Brushing off new bubble warnings, Google's AI comeback and Nvidia's China threat

1. Alphabet CEO warns of a potential AI investment bubble. 2. Google's cloud business shows strong revenue growth and backlog. 3. Google surpassed Microsoft in market cap due to AI momentum. 4. Launch of Gemini 3 elevates Google's standing in AI rankings. 5. Nvidia's earnings failed to stabilize the market amid geopolitical concerns.