All the window seats will most likely be taken by that time. To watch the show (very limited views, IMO) you would need a reservation for around 7:30 - 7:45. That's not to say you can't try, or arrive a little earlier and put in your request.
We've done it several times, but I never asked for a window seat because only a very few of them have views at all. Since we're usually a larger party of 6, we've gotten the bigger round tables near the windows, but the times we've been with 2 or 4 people we've gotten the middle of the restaurant tables.