The basic architecture of Aspen Avionics Connected Panel networked cockpit is depicted below, courtesy the company. Wireless equipment in the cockpit is nothing new, but it rarely was connected to anything other than audio.
Now, some of the latest avionics solutions wirelessly link consumer-grade devices and their apps to an aircrafts various systems. Connecting a tablets EFB software to installed and certified avionics opens up many new possibilities and upgrade paths.