Nothing but my computers. I don't want anything that affects my real, physical life to be open to trickery. Imagine having someone checking what is in your mailbox, what your waking hours are, how much weight you've gained, where you drove last night — it's not worth it to gain a little convenience.
Even in my car: I'd just use my phone (instead of something else (another and likely worse UI)). It may turn out totally different in ~10, ~20 years...
... but remember: Something comes along and the expectations are high and then we see and realize that in practice it's less spectacular / much more modest.
The iPhone and Android are great, but extending it to a smart-watch?... that's kind of a lame idea. I don't care.
Hopefully we have something less expected and more exciting by then.
So to me it's a hype word, where I shiver a bit, since I remember the .com-bubble ("Internet of Commerce" if you will) and so many other "wordings", which passed by and got replaced by the next wording (and are still not catching on).