Hi,
A few ideas are:
1. You could cover the window with clear frosted contact paper which would blur the view but keep the window a window.
2. You could put a shelf on the garage side and put plants on it. (Or anything you want)
3. You could take a picture of a beautiful scene and have it blown up to fit the window. You could do this a few times a year so that your scene changes. (or seasonal). Good luck!