You seem to have two related threads on the forum here...
My take is that anything electronic with any level of intercommunication is vulnerable at some level.

I am a staunch proponent for dedicated systems in home control, as an example, and security is only one concern. I do not want my clients to have to sit through 3 hours of tech support from India to get their lights back on when a worm infiltrates their all-in-one Bill Gates internet portal, media server, and home automation controller PC.

As for the related question on the other thread, I vote to leave the security consult and network administration to a specialty IT services company. It is difficult enough to delegate time and money to keep a staff trained with the changes in our own industry, much less take on a lightning fast changes of the IT industry.

I do believe that someday soon on-call emergency techs, like the "Geek Squad" model, will be the as common in the the US as the ubiquitous Roto Rooter vans and locksmith trucks.
I imagine 24 hr. dispatched on-site tech service with dozens of little VW Beetles in every city full of propellerhead kids fixing hardware and software issues to make out homes work again.