It can be run in a window and it resizes pretty well, but it usually looks best when run maximized to show off all your big beautiful artwork. Over time it evolved to add a playlist, library view, and other features which make it perfectly suitable for using on a desktop as well. It’s original purpose was to be used on a HTPC so it has large album artwork, plenty of logos and other eye candy. Georgia is a theme for foobar2000 designed to change dynamically based on album art.