Well, that's the dream IoT is selling. But the reality is that most of it won't work. The big brands that the vast majority of consumers recognize and are willing to buy and can afford are simply not competent to deliver the dream.
They will make the devices work just well enough to gather your personal data and stop there. For most of the rest of our lifetimes, IoT will be the same shitshow of incompatible nightmares as plug-and-play was for Windows throughout most of the 90s.
But it will win, and it will be the next big thing for a similar reason: not because it's good or because it works well, but because that's all anyone is selling.