There is a deck on the 6th floor which is open to view the World of Color watershow. It's nothing fancy, though. Don't believe there is any seating. Limited front row space along the rail. And it provides a side view--partially obstructed--of the show.
Also no refreshments, no computer terminals, no other amenities.
It really doesn't compare at all to watching it from the viewing area in DCA. Even watching it from the backside of the show is better than the "viewing" platform.