It's not that big an if.
As i said before, since Sky 3DS emulates a real cart(the "Exploit" is hardware based), it's possible that the only way to block it is by blocking old genuine carts.
I'm not quite sure that 3 year old hardware is going to be reprogrammable for too long(nor do I think that they can cause it to function the same way as Sky 3DS).
when Gateway came out, it had a price tag of over 100$, ran 1 3ds game at a time and caused some issues when updated.
Don't be a blind fanboy, Sky 3DS just came out, it might be more powerful than you think.