There is Teamviewer Apps for Android and IOS. We have in our hands another device (for example a nexus7 tablet) and we are connected to WiFi hotspot.
Suppose that we are on holidays far from home and we need to accomplish a task on our home computer using the graphical desktop. Probably is not as secure as other linux solutions (as VNC or a VPN) but the main advantage is that is very easy to install and configure.
Teamviewer is a wonderful tool to access your computer (or any other device) remotely if you need to use your a graphical screen.
