Pretty sure there was a goal not too long ago which exploited the new rule; a player from team 1 chased down a backpass, the keeper from team from 2 cleared the ball downfield, and it ran through to the keeper from team 1 via a backpass, he cleared it up the midfield where a defender from team 2 got a flick on, and it ran through to the original attacker from team 1, who wasn't offside due to the new ruling (despite being 20 yards behind the last defender) and prompty put it away.
The forward initially stopped, maybe anticipating a whistle.