Difference is now they'll be kicking into the in goal and not before the line. As soon as the attacker catches it, it a try. Simply no way to stop them
Most of the time they still land on their feet in that situation(its instincts) which gives you a good chance to stop it, in particular if you are ready for it and have practiced for it. Kicking into the in goal comes with its own risks also.
It something that can certainly be a weapon for teams, but I don't think we are going to see every short winger forced out because of it. Getting the kick and chase right and not getting run off your jump is a pretty big challenge, once in the air defensive teams will play it safe a lot more now and just look to knock the ball out if they can get a hand to it. I just don't see it as having a huge impact.