SketchUp? Google let user build up their own houses?

Just browse sketchup.google.com. I just curious of the integration between Google and SketchUp. As you can see right here. Sooner than I think, Google integrate sketchup less than 50 days. 50 days! What the f... quick! How did Google do that? BenQ acquire mobile department of Simens nearby 2 years and still struggle for integration. I remember Microsoft had acquire lots of small software company but never launch new version so soon. The management process of Google stays mysterious...