That is a very difficult shot. Did you manually set the exposure or let the camera's automation do it? Here's the problem: If the exposure is set to show room detail, the lighted windows and exterior scene tends to burn out. If the exposure is set for what is seen through the windows, then it gets too dark to capture interior detail. Also challenging is the difference in light value of the highly lighted floor areas compared to the part in shadow. Your camera's sensor must have a wide dynamic range and the exposure was just right to have captured this shot. Congratulations!

You should use a flash, pointed at the ceiling to fill in the darker areas. Too much detail is lost in the shadows, particularly the flowers and area rug. Also, adjust your horizon (unless you live on a hill).