I mean, yeah, many of us are suckers for convenience but take that example, the IoT-enabled shopping cart personalising your shopping experience - is that really fixing much of a problem at all? Haven't we been managing getting eggs, milk and artisanal olive oils just fine without need of help from the shopping cart - and if it intervenes, in whose interest is that likely to be, you, the consumer, or the vendor/shop owner who'd really like you to also check out these other items over here by the [stuff you weren't shopping for] and who pays through the nose for those wifi-enabled carts?
Haven't we been largely able to manage the heating of our homes with thermostats and common sense without access to the radiator from our smartphones at the office?
It seems to me quite a few of these IoT projects are more about adding cat flaps to your everyday life through which outside agents can constantly inject themselves in order to persuade you to buy their stuff, than it is about genuinely addressing actual tasks that require a new, meaningful solution.
Basically, it's like apps to your Facebook account - sure it tells you it's there to keep you up to speed on your friend's games or whatever, but what it really does is stick a straw into your personal life, and what it sucks out it sells to somebody or monetizes in some other way. And just like you should show judicial care when allowing those apps, we need to be (even more) careful about letting Things Internet their way into our lives. Not paranoid, not luddite'ish, just regular ol' careful.