Shame. Having grown up in DC, I always undervalued the local museums, memorials and monuments. It wasn't till I moved 3000 miles away that I realized how cool all that was and I miss having it just a subway stop away from me tremendously. No, the view from the top of the Washington Monument isn't really different from other high-rises in the area, and unless you're familiar with the geography of the area, it probably won't mean anything to you. But it was still cool to do and see when I went up there as a kid, and I'd feel terrible if they have to close the Monument for good, knowing other little kids wouldn't have the same experience.
To each their own though.