Is it possible to use the ZED cameras with tablets like the Surface Pro, iPad and mobile devices, to get 3D mapping? 

As the computer needs to be equipped with an NVIDIA GPU with CUDA computing capabilities to perform real-time 3D spatial mapping, unfortunately, a tablet won't be compatible

The ZED cameras are designed as USB devices meant to be connected to a host computer. The ZED camera outputs a high-resolution side-by-side color video on USB 3.0 and this color video is used by the ZED software on the host machine to create a depth map of the scene.

However, a gaming-grade laptop would perfectly suit the cameras and you will get the required results you need.