Ubuntu 10.10 only has Unitity as the default in the NetBook Remix version. So the use of Unity by default in the desktop version of Ubuntu 11.04 is new. It's also somewhat controversial because it means that Ubuntu are GNOME Shell desktop that will be the default in GNOME 3. The GNOME Shell is quite different to what has come before it and is itself quite controversial. That Ubuntu, one if not the, most used distros that uses GNOME for it's default Desktop environment has chosen to develop it's own interface for GNOME rather than use GNOME Shell has inevitably created 'hoo ha'.
I assume when you say 'different name for OpenOffice' you are referring to the inclusion of LibreOffice instead of OpenOffice. This change is not unique to Ubuntu. Also it's not a 'different name for OpenOffice' because OpenOffice still exists. LibreOffice is a fork of OpenOffice.