That's where Google integration will play into it.
You need that file on your Android phone? It's there on the filesystem, no need to open another app. Want to open a file in Google Docs? You click on it in the side panel. Want to share a file on Google+? You just click the name, no upload required. Want to email multiple files through Gmail? Click on them from the nice web interface and don't waste time uploading. Want to post a video to Youtube? Select it from your GDrive, and it appears on Youtube instantly. Etc etc.
You need that file on your Android phone? It's there on the filesystem, no need to open another app. Want to open a file in Google Docs? You click on it in the side panel. Want to share a file on Google+? You just click the name, no upload required. Want to email multiple files through Gmail? Click on them from the nice web interface and don't waste time uploading. Want to post a video to Youtube? Select it from your GDrive, and it appears on Youtube instantly. Etc etc.