That's not any different then it would be now. Except now - there's a heightened awareness of the bug/virus/vulnerability. In 6 months from now after the patch - those that didn't update or didn't even know about an update will be even further from figuring out what went wrong.
TheSpaz - right now - if your phone started wacking out after getting a text - you'd immediately figure it was this vulnerability. In 6 months, perhaps not YOU specifically - but others might not add it up and get the same conclusion. They'll just see their phone bugging out and not know why.
The txt messages (btw) aren't necc. visible either. They can and from what I read - in the background never seen by the user.
Additionally - if you read the articles - you'd know it's not JUST the iphone.
Again - I am not trying to be contrary. I am merely saying that just because the patch is offered - doesn't mean the people that would launch an attack would quiet down. If anything - it might make it more fun/challenging to see who they can hijack.
A good model are virus definition files. Lots of people fail to update their anti-virus software. And clearly there are still attacks using methods which were "patched"