Video calls, communication and control of equipment remotely.
Replace large screens with holograms.
The tablets will be more powerful, it's be many other functions that will bring together the characteristics currently performed by computers and smartphones, this objects won't be limited and may usefull for read digital books and realise funtions of a complite computer.
In the next years people will use a different kind of watch, in which the holograms will use to the visualization the our information, will be see the emails, instant messaging, make payments and monitor our health status.
The smartphones will be more thin, light and receipt the commands by the voice only, the storage capacity will be much larger and there may no storage limit.
Computers and VR
The computers won't be as we know them today, their data processing capacity will the best compared to other devices, won't be boring and may not get the same size thats nowa days.
The people won't be use a screen any more, the VR will be a tool that's replace many of there and It will make communication visual and real, like having a face-to-face conversation.