According to some in security analysis, it's just a matter of time:
With nearly every device, from healthcare to transportation, being controlled or communicated with in some way via the Internet, IID predicts that criminals will leverage this to carry out murders. Examples include a pacemaker that can be tuned remotely, an Internet-connected car that can have its control systems altered, or an IV drip that can be shut off with a click of a mouse.
“With so many devices being Internet connected, it makes murdering people remotely relatively simple, at least from a technical perspective. That’s horrifying,” continued Rasmussen. “Killings can be carried out with a significantly lower chance of getting caught, much less convicted, and if human history shows us anything, if you can find a new way to kill, it will be eventually be used.”
Also on the horizon over the next couple of years: Near Field Communication hijacking. NFC is widely advertised already, portraying innocent transactions in which husband and wife slap their cell phones together and instantly exchange schedules, for example - and in itself, NFC is fairly secure. Widespread development of apps using the technology is anticipated, however, and are likely to be exploited due to loopholes in the apps themselves, with potentially devastating consequences when applied to financial transactions.
The further removed users are from the command line, the more vulnerable they become.