Stack Overflow, as we know, switched to a new header design. When will redesigned header be avaliable for all Q/As?
We don't have a definite timeline for rollout to the rest of the network.
After those, we would be migrating the different designed sites - each of these has a different look, so we need to make sure the header design fits them.
We have also not decided yet what form the rollout will take - we may end up just tweaking the current headers to bring them in line with the Stack Overflow header.