Dan Steinberg is reporting this morning
that the Nats are expanding the Clubhouse Team Store, which includes moving it from its current location on the west side of the Center Field Gate to a "larger space located on the right field side of Center Field Plaza [...] on the way toward the kids playground area." An accompanying photo shows that it's the old Playstation space.
But there's also this tidbit, from an e-mail sent to Steinberg by a Nationals representative: "The team store will continue to operate in its current location until the new store is fully constructed later in the season. Once the new store opens, we plan to convert the old space into a restaurant that fans will be able to enjoy throughout the year. An official announcement on the restaurant will be made as soon as details are finalized."