As you all know, Ubuntu available in three flavors, a Desktop edition, Netbook edition, and a Server edition. Netbook edition has an innovative desktop called Unity, which was optimized for smaller screens. However, from Ubuntu 11.04 onwards there will not a separate Netbook edition or desktop edition.
According to Canonical, “The introduction of the new shell for Ubuntu means that we have a user interface that works equally well whatever the form factor of the PC. And the underlying technology works on a range of architectures including those common in netbook, notebooks, desktops or whatever you choose to run it on. Hence the need for a separate version for netbooks is removed”.
“From 11.04, the core product that you run on your PC will be simply, Ubuntu. Therefore the next release will be Ubuntu 11.04 and you can run that on anything you like from a netbook to a notebook to a desktop”.
However, Ubuntu Server edition will be maintained as a separate product and it named simply as Ubuntu Server 11.04. (via)