Today, when we speak of a device, we usually mean something that is electronic in nature, crammed chock full of even tinier devices called transistors. This took such a flight that eventually Gordon Moore predicted in 1965 that "the number of transistors per silicon chip doubles every year". I retraced history later on after claiming moorelife.nl as my domain, and found it actually doubled every 22 months, but so do other parameters of what makes a computer. So development is probably going even faster than Moore imagined.
And yes, we cannot imagine a world without devices anymore, whether they are external or internal: some humans avoid even the most basic electronic devices, choosing instead to live an analog or even more primitive life. Others are on the other extreme of the spectrum, and hack their own bodies. I am somewhere above the middle of the spectrum, knowing quite a bit about technology, but still not commanding my home through devices like Google, Alexa, Siri, or whatever they are called.
It's not that I don't want to, but the technology is still not mature enough to give me the amount of interactivity that a human experience does. I am however taking a keen interest in AI and robotics, and whatever follows from this...