How nice it is to be able to share pleasant bits of news like this, which I received by e-mail. Apparently, the main altar (the real altar) of the National Shrine is getting some use!
Dear Rev. Father,
Last Sunday, at the 4:30 pm Mass, the Mass was said from the great High Altar. The movable altar was cleared away. I have it on good authority that the Shrine’s Liturgy Chief, Fr. Weston, confirmed that the Shrine was going to use the "old" altar on an experimental basis.
If you attend Mass when the older altar is used, be sure to give them feedback so they have something to work with!