Yes, basically Roll20 is an app for use in Hangouts as well as being available on it's own website.
Essentially, you (or your GM) lay out whatever graphics elements you want to use on a series of pages just like you would set up a regular campaign for that Zebras & Zeppelins game that everyone loves so much. Being an Edge of the Empire Game you wouldn't needed gridded maps or anything necessarily, but in return you could do some really interesting, story enhancing things with Roll20 and EotE.
For instance, creating Epic location scenes within the app to give players a sense of place. Like maybe a screen cap of your favorite place in SW:TOR used as a backdrop so folks know exactly what the particular section of Tattooine they are in looks like.
You could lay out a static 'opening crawl' in Roll20 to start your adventures with. You could design your own card deck within the app and play Sabaac while you wait for people to show up, or as part of your game itself. Wookieepedia has many fine images that might allow you to display what particular adversaries look like. There is all sorts of stuff you can do, because Roll20 is pretty flexible.
And now, with the dice app above, you can actually execute the whole game in the Roll20 app without having to rely on people rolling off screen and relaying what they rolled.
There are a fair number of Roll20 videos up on YouTube if you need more concrete usage examples.