Self-publishing (like Hive) is definitely a recent development, as well... I used some of the very earliest blogs (about 1998) and they seemed so simple, compared to what we can do now!
I expect the next big thing we're likely to see is the disappearance of the desktop computer. Sure, people will likely still have big screens, but you'll just plug the same phone you carry into your desktop monitor, your laptop and so forth... one piece of tech, total portability.
We have already seen many advances in the case of desktop computers. It is interesting, however, I wonder how it could be adapted to different types of activities.
For example, in the field of urban planning and architecture, desktop computers are a vital tool for design. Although, it is true that laptops are the alternative, there is still work being done on these types of computers.
I imagine, something similar, a kind of transparent glass screen that can simply be commanded by voice. The change would be very drastic. Hypothetical, but possible.