Google is updating their Google Drive app for Android this week, but the app will actually remove some functionality from it, likely because of the release of separate apps for documents and spreadsheets.
To edit any documents users will need to install the new Docs and Sheets apps, although these documents can be viewed on the main Drive app. Once the new apps are installed, the features and functions are much the same as the old Drive app. Hit the break for more info, as well as the Play Store download link!
A powerpoint presentations app should be on its way, which will work much the same way as the other apps in the Google Drive family.