The Google+ Android app does basically the same thing. It syncs everything from your camera to the cloud (configurable, but I believe the default is to sync always when on wifi), where you can choose to share them at your leisure. It's actually really handy. My wife is routinely not uploading cute kid photos to Facebook from her iPhone because it's too much of an annoyance (or because she doesn't want to compose the text to go with it). I can do it at my desktop whenever the mood hits me.
It's important to mention that when you install the Google+ app one of the configuration steps asks if you want to auto-upload your photos. You have three options: "Upload over wifi only", "Upload over wifi and mobile", and "Don't automatically upload". I believe the default is wifi-only.
You can turn it off later in the settings quite easily.
