People have been using O2 Jogglers in their kitchen and on top of their fridges for ages as information and calendar displays and I imagine there are some people who have smart phones 'glued' to kitchen cabinets and elsewhere to do the same and similar.
If people want to do that, or manufacturers want to jump on that bandwagon and sell them what they think is 'even better', I don't see the problem with that. In fact it's one of the few areas where I see "smart" and "IoT" making sense, though I'd say it is not so much either as simply "connected".
As for criticising the "smart clock" I don't see any real difference between a clock which pulls the time from the airwaves or the internet or why one needs to disparage such a thing. Perhaps some people cannot see the advantage of a clock which adjusts its time to day of week, whether it's a weekday, weekend or holiday, and requires no adjustment as summer time starts and ends but I can. But no one has to have one if they don't want that.
Yes, there are security, hacking and privacy issues, but they are the same whether the connected device is in, on, or on top of the fridge or elsewhere.
I really don't think it's worth getting into a Luddite-like tizzy simply because one cannot personally see the use or benefit of such things.