IoT all the things!
IoT is great but what worries me is this centralisation. Here are my concerning scenarios:
* You buy a thermostat and it works great but perhaps you want to change supplier or service provider and now you lose some functionality.
* You buy some IoT widget that does something interesting. The company that developed it loses interest in it, can't make money from it or goes bankrupt. Your widget no longer works and worse still is now landfill.
The lack of open standards, open platforms and the rise of lock-in in these things makes me worry. BTW, I've got a Nest but it replaced a Heatmiser which was interesting because it had a micro webserver on-board which allowed you to programme and control it with simple requests. The Nest is more fancy, more beautiful and works better overall but when the connectivity fails the gains worry me.