If I were you, I would approach the landlord, let him/her know of your intentions of moving in 8 months and move forward. Then they can plan on when to get a new tenant and you can plan on your move to the new building.
All landlords want are as much certainty as is possible. Even "bad news" of a tenant leaving is not bad given you have notice. This is why month to month doesn't work without an increase in rent.
That's my best bet. I'll just try to work with them and if possible, find a subleasee.
With downtown's demand, I'm sure I won't have too much of a problem with this.