I think it will stay in the center of attention and certainly wil have the new stuff from the next xpac.
The first step in that direction (of keeping it) is the fact that is is going to be player-owned. This is the first thing in the wow-universe which is really player-owned.
It will become a inn, so we'll be resting while we are on the farm.
We have a portal-seeds-vendor...... from here it isn't a big step to create a permanent portal in the house.
So whereever the future xpacs are going to be situated, we'll always come back to our farm... maybe we can set our hs there?
it wouldn't be very hard to upgrade the seeds we are having now... I mean, we're getting the same things every xpac, leather, herbs, ores, enchanting material.... how hard can it be to upgrade the seeds to reflect the new mats?
We have quite some space, even a lake.
We can rebuild the house, make it bigger.... maybe even a cellar where we can store stuff.. not only from the farm but much more.
There is a lot there can be done... and by making it player-owned I think Blizz is finally providing us an own home, which we can transform over time as we like.
There could be a lot of uses for this... why need a stable master out in the world? We can stable our pets/companions/mounts at home.
We can deploy npc's for various tasks.