When bluetooth was first taken seriously it was vaunted as a a useful tool for users as well as manufacturers and the idea was that you could switch the kettle on 3 minutes before you get home, programme domestic appliances to work in the middle of the night when fuel costs are cheaper, put the heating on when you arrive back from holiday etc.
However the problem was and is the same problem experienced by the traditional "teasmades" which have been around since 1930s - you have to set them up first. A teasmade works using a clock timer but it's f*** all use if you don't fill the water, put in the tea etc in advance - and it has the additional potential hazard of having to remain plugged in through out the night. Similarly you can get your toaster to come on just before you get home, but it does mean you have to leave the bread in it whilst you're out.
Toasters have little or no user benefit from internet connectivity and as the guy points out, are a potential security risk but unless they are fitted with a camera, I don't think they'll be much of a threat. But the point he makes about legal responsibility is very important and maybe the cost to manufacturers of installing connectivity is low only because they currently take no responsibility for security issues. Maybe if they were responsible, they wouldn't put connectivity into domestic appliances after all?