That's just how it's going to work, every day throughout the year. As part of Disney's Year of a Million Dreams celebration, one lucky family will be chosen every day to spend the night in the castle and generally be treated like royalty - as grand marshals of the parade, with VIP seating for the SpectroMagic parade and the Wishes fireworks show, and even two hours of private park time after hours in the Magic Kingdom.
Find out how you can win, and take a peek inside with pictures of Cinderella's Castle Suite.
By the way, all the windows in the castle suite face west, to Fantasyland, and all are stained glass. This is partly because it fits with the theming, and partly for practical reasons. At night, the lights in the Magic Kingdom are turned up, and nightly maintenance is performed on the theme park as surfaces are scrubbed and repainted. In order to preserve the magic, the view from the windows is restricted to Fantasyland.
My first thought was, "How do you see the fireworks from here?" Although you can see them through the windows, the guest suite family also has VIP fireworks seating just outside.