You can click the option to see all the updated packages that will be installed and view their changelogs, if you want more information.
In a future release of Ubuntu, software updates may be integrated into the Ubuntu Software Center The Software Updater application and the Ubuntu Software Center all use the apt-get package manager in the background.
12.04 improves on Unity's strengths, and addresses some of your old complaints.
It's fast, includes new features desktop users will love, and, as always,... When Libre Office 3.7 is released, it won’t be added to the current version of Ubuntu – it will be added to the next release of Ubuntu, Ubuntu 13.04.
The alternative to PPAs is generally compiling the software yourself.
When a new version of Ubuntu is released, you can download it as an ISO file from Ubuntu’s website and install it over your existing Ubuntu system.
Do you have any other questions about how software updating works on Ubuntu?
Or do you have a favorite PPA or two you’d like to share?
However, you can easily get the latest versions of your favorite applications, even if Ubuntu doesn’t include them yet.
Canonical releases new versions of Ubuntu every six months, in October and April.
The next release will be Ubuntu 13.04, which will be released in the fourth month of 2013 (April 2013). Most releases are standard releases, which are supported with security updates for 18 months.