(1) Past: Microprocessors.
(2) Past: The home computing revolution.
(3) Past: Non-mainframe, non-terminal computers in businesses of all sizes (mainly IBM PC).
(4) Past: Internet (as communications infrastructure and subsequently worldwide lifestyle and business model changer). The significance of this cannot be underestimated and probably cannot yet be fully appreciated. Although development of what became the Internet as we know it today began before step 1 above, it came into its own as we now know it (and could only come into its own in this way) only after steps 2 and 3 became widespread reality.
(5) Past and present: Cloud computing (encouraged by advances in computing technology and the infrastructure/communication capabilities of the Internet, especially ubiquity and relative reliability).
(6) Past and present: Mobile computing (both encouraged by and symbiotic with cloud computing (step 5) and facilitated by further advances in computing technology).
(7) Present and near future: IoT and in-home AI (a natural growth from all that went before, especially 4, 5 and 6).
(8) Slightly further future: Fully ubiquitous computing. I.e. You are never, no matter where you are, detached from a network-connected computer of some sort. It knows who you are and reacts to your voice, gestures, or other subtle inputs such as mood. AI is increasingly ubiquitous. Having to explicitly think about providing input to a computer to get what you want is largely outmoded and unnecessary, except perhaps for techies and blanks. This era was actually predicted long ago but the network/cloud-centric, commercially-exploited, nature of it was not necessarily predicted. Of course, it took commercial exploitation to make it possible. (This will be within the lifetime of many on this forum).
(9) Further future: AI and robotics become totally ubiquitous. It ushers in new uncertainties about the role of humans and about economic models by offering new opportunities/risks of a nature that humans have never had to address before. This time it is entirely different to any previous introduction of new technology. See
Humans Need Not Apply for a lucid explanation of why it will be different this time and why economic models will need to change. (This will be within the lifetime of quite a few on this forum).
(10) Longer term future: Who knows. A rejection of ubiquitous technology, AI and robotics, perhaps?