Here is a short selection from the article:
...This design will have an impact beyond Ubuntu. Canonical has expressed interest in upstreams adopting their proposal ideas, particularly GNOME which is the Ubuntu default desktop environment. It also is expected that the CNS will also be implemented and integrated in to Kubuntu, a KDE-based Ubuntu derivative.
To date, there has been no usability testing or validation of the proposed CNS. The following is a summary of a literature review I conducted to help evaluate the proposal and its impact on Kubuntu and KDE.
Source: http://weblog.obso1337.org/
