Ubiquity of general-purpose computers = ubiquity of general purpose security problems.
Things will only get worse as companies realise that it's cheaper to just put a Raspberry Pi in place of that specialist circuit board that controls everything, and then it's only one click from putting it on the net in the next model.
Seriously - look at the RPi zero boards with their wifi and GPIO. You're not telling me that making that old ancient washing machine control board is cheaper than that? Even the Arduino was a micro-controller really, but now it's just as cheap to deploy a full machine.
Economics of general-purpose computers that small, cheap, well-connected and powerful is going to be the end of any kind of sense in electronic devices. Prepare to see them in everything from phones and answering machines to clocks and radios.