[mikester]

Remote Desktop (Or go to my PC) is not VPN.

VPN is securely connecting to a remote network, essentially extending the destination network into your remote location via a secure (typically IPSEC) tunnel. It requires some sort of VPN concentrator at the destination network to accept and manage the tunnel traffic and put the clients onto the destination network. Then there is the client software which is loaded on the PC to initiate the VPN tunnel to the destination.

Even with a "VPN" you would still use something like Remote Desktop to actually control your PC at your office. VPN is more of a network infrastructure tool than an application. Think of it as the pavement on the road. The Road itself being the internet but the pavement shields you from the path cut into the ground giving you a safer ride.