Tactus wants to bring the physical keyboards back, but this turn, only when you need them.
Tactus solution is completely transparent and controlled by the applications. Any kind of buttons, when you need them, and a smooth surface when you don’t need them.
The camera in the left is one of their examples, where the buttons only show up when you are in the settings. Different buttons can be displayed when you are in a different screen or using a different application.
This seems to be a new interface to challenge what seems to be the trend at the moment – the swiping keyboards.