I came across the following information on the website:
"Connect to your Raspberry Pi over Ethernet or Wi-Fi, use MATLAB to acquire data from connected devices, and then analyze and visualize it in MATLAB. Access signal processing and video algorithms through add-on products such as DSP System Toolbox™, Image Processing Toolbox™, and Computer Vision System Toolbox™."
The Ethernet part is not really clear, cause I think it could mean connecting to internet via a cable and not a direct connection between computer and Pi to send and receive data. If i'm right, it means both. You can connect wired to the internet en then make a TCP/IP connection with Matlab, or a direct connection between PC and Pi.