Actually we were just chatting about this last night. I'd say my husband and I will likely move away from this house before either of the kids move out. The oldest is only 11, so a few more years at least before he should be going anywhere.
The idea is for us (me and dazza) to move out of the city and leave this house for the kids to live in while they're in uni or trying to get themselves set up as adults. That's a few years away though. We're looking for a block of land somewhere on the coast atm though. We figure that way we'll be able to find the perfect spot.