After two days running the new beta version of Ubuntu I am still completely confused.
The default desktop interface has gone from the easy to use Gnome to the extremely confusing Unity. Meanwhile the beta seems to have screwed up many of the features of Gnome if you choose to go back to what they now call Classic Ubuntu.
The main feature is a strip of icons running down the left hand side of the screen, offering links to installed programs and folders. To describe it as clunky would be kind. It has none of the ease of use of the Windows 7 or OS X equivalents. It seems to take the lead from one of the worst Mac features when changing between open full sized applications in that the best way to do so is to use Alt + Tab.
I can't see this being fixed for the full release in May but if it isn't, then my laptop is going to get a different version of Linux.