Earlier today the new trailer for Star Wars: The Force Awakens hit the blog. Not only that, we saw a set of new images released as well. The full set is over on that page.
This page is just some of the images from the other post but converted into 1366×768 pixel sized wallpaper. The standard[ish] size for most laptop screens. Even if your screen is bigger it should stretch to fit and not lose that much definition. Just click on any of the wallpepers and then download it from that page.
Star Wars: The Force Awakens will be set 30 years after the events of Return of the Jedi.