Google launched Google Drive today. You can dig in here. A host of companies from DropBox to insync will take notice.
Early evidence is that Google really will push Google Drive. The Google nav bar, the black strip across so many Google properties, has been updated. Google has replaced the "Documents" link with "Drive".*
In fact, once you sign up to Drive you can no longer access
docs.google.comas you get redirected to
* This may be the result of downloading and logging into Drive.