The Future security mobile botnets take over ipone just with A SMS

Today at the cybersecurity conference known as Black Hack, researchers Charlie Miller and Collin Mulliner will present an SMS exploit that could take over your iPhone with just one text. Once the phone is compromised, the hacker would have access to all the functions on the phone allowing them to send email, access your contacts, make phone calls, and of course, send text messages that would send the exploit to more devices.
This serious vulnerability (which apparently Apple sat on for over a month) is probably the first time that most people have heard of mobile phones being used to create botnets. However, this isn't the first sighting of a mobile phone hijacking attempt for the purpose of botnet creation - a similar exploit was discovered earlier this month. Does this mean we're on the verge of a new and dangerous trend: the creation of "zombie" phones?