I'm not sure I endorse it as a terminological shift, insofar as catastrophic risks and existential risks are different things and using one label to refer to the other entity creates a lot of confusion. But I definitely endorse being concerned with catastrophic risks rather than solely with existential risks, and endorse properly labeling the object of my concern.
The idea that "existential risks" is an abbreviation for "global existential risks" just seems awful to me.
More: Skoll Global Threats Fund | To Safeguard Humanity from Global Threats
More on existential risks: wiki.lesswrong.com/wiki/Existential_risk
Organisations
A list of organisations and charities concerned with existential risk research.
Resources