Up to now Mac offered the function “Back to my Mac” integrated in the operating system with which one could access a Mac at home from everywhere. The function will be cancelled in macOS Mojave.
The feature requires an iCloud connection and connects both Macs directly, so you could access your data on the go. However, the loss is not particularly bad: For example, you can use the “screen sharing” function in your home network and establish a VPN connection to your router while on the move and thus have the same functionality.