Do not miss the videos on that announcement page, but that's not the
end, there's more. There is a feature guide which gives more
information on KDE stack of software. You can access it here...
They also have a KDE-Windows team, people who port their software to
Windows platform and the good news is that they have ported KDE SC 4.4
to Windows. You can download and try it from here...
[KDE on Windows is not in the final state, so applications can be
unsuitable for day to day use yet.]
They also launched redesigned version of homepage of their website.
Check it out at http://www.kde.org/