We have TiVo too. DS and I did the same thing, pausing, rewinding and slow-mo trying to figure out what resort it could be. We couldn't completely make out that it was Cinderella's Castle in view out the window but assumed that it must be. Given the view I could only guess that the room, if real, would be at CR.
At first, I thought as others have, maybe Disney redecorated a room in CR specifically for the TV spot. This seems extreme and expensive, unless Disney is in the process of redecorating all CR rooms. However, if this were the case the DISboards would know about it.
Unfortunately, I think I must side with those that believe the wonderfully decorated room featured in the TV spot is only a set. How disappointing to not have an opportunity to stay in that room, or one like it.