I think that this is going to be a point of entry for malware, worms and DDoS in the not too distant future. The advice to choose your hardware wisely is huge but sadly I doubt that we'll ever really know all of the vulnerabilities of devices that are placed inside our walls. The first malware for smart thermostats has been introduced and I'm sure not many people thought that one day they may be held hostage on the hottest day of the year as hackers demand payment before they can turn their air conditioner on. I've been seeing warnings since the very start of IoT talks, have been on the forefront of warning people about the controls that are vulnerable in many modern vehicles and I continue to keep my eyes open for the next good idea where security doesn't just take a back seat, it isn't even on the bus. Most of these systems that we're seeing compromised ignore almost every security recommendation ever given to any project. They assume that no one will think to try accessing it but they are installed as part of a larger system that tinkerers love to play in. Jeep's problems with securing various parts of their control systems is a glaring demonstration of how walls should be kept between systems. If I can disable your brakes through the system that controls your DVD player we have a real problem.