Happen to know which interview that was mentioned in? Curious if there's any hints to be gleamed from it regarding possible timeframes.

That said, if they don't give a specific timing for something then it's one of those "up in the air until they finish it/get it working" type things. Might be coming with 4.1 or a sub-patch, might be they want to make the change sometime in the 4.x series, might be they don't know when they'll have it ready and so just aren't locking down a time for it.

I do hope it gets added, it would definitely be a nice change.