he won't be the same threat.

It's not to say that he won't perform well, but his style of play will need to change one way or another, which will minimize the threat he once presented.

Otherwise, his career will be very short.

If he would have been taken out from the Ravens game onward, he would have better chance to be the same RGIII again, but by aggravating like that with continuous play... nah.. no bueno.

Whether because of pain or just being a smarter player, he'll have to cut that stuff out going forward.