When we went a year ago, they did pipe in the music but we were seated behind the pit (near the lobby and bar) so we could not see it and none of the tables around us stopped their conversations and activities to watch, it was like nothing was going on. Our waiters continued to bring food, people continued to be seated, and the lobby was still very loud with activity. We opted to walk around to see it, and others did too from around the restaurant, but because there is a step down, you have to either drag a chair over (a couple of people did that!) or stoop over. Plus you stand pretty near others tables so you can see it and the waiters can still get by. Needless to say, Wishes is pretty long and after 4-5 minutes or bending over I gave up and went back to eat some more. I also don't find the view that great, nothing compared to Main St, so I didn't feel I was missing much.
No one went and stood by the windows, as that would have blocked the majority of the tables views and there really isn't room to.
So my thought is to schedule it and be willing to wait for a table witha view, or go before or after and watch from the beach.