“Google on Thursday announced the launch of a “Save to Drive” button for its Google Drive service. The feature is available now: you can implement it on your site as well as start saving files from sites that have already done so.
For Web developers, the button means adding just two lines of HTML to their site. For Google Drive users, all it takes is one click and the file in question is saved to their account.”
In a way it does help to have the intermediate step save to device, and then cloud optimised but I think that the most relevant use of this button would be the ability to download snippets of code off tutorial sites and forums.