While Dropbox for Android has added drops of Material Design in previous updates, it's put the final splash on the version 3.0 update, which is available now in the Play Store.
With this latest build you'll see a flat, slide-out menu to access your files, photos, favorites, and notifications. Your initials also dominate the top portion of the screen in a logo-style design.
The interface adds color to the status bar on some screens, which gives a more uniform look to the app. The floating action button now will create a new folder, text file, upload files, take a picture, or insert content from your computer.
If you have Dropbox on your device already and don't want to wait for the update to make the usual, slow rollout to the Play Store then grab it now from APK Mirror.
The impact on you: Even though the rollout of Material Design may not have been a quick as Google would have preferred, eventually you'll find the majority of Android apps follow these general patterns. It brings some consistency to how apps look and perform, which had long been a weakness on Android.