apt-get update refresh the package listing, which tells the system these are the latest packages.
running apt-get upgrade, or apt-get dist-upgrade will download and install the updated packages.
Typically, it'll show you a list of packages that have updates, and a yes/no option if you don't want to install, or not.
There are other commands to look at in the man page
Thank's, looks like I'm fully up to date then.
Toshiba Satellite Running Ubuntu Development Release