The
property is just too valuable to use for a low-profit operation (in contrast to housing.)
"Shortly" is not likely but "within a few years" is probably correct. They were going to move some years ago but extended their lease. It is now expiring in 2012, I have heard (haven't validated this directly). No idea where they are moving to.
ISS is right next door but still seems to have a lease and hasn't announced any intentions of moving.