Let me start by saying that I am a big fan of Quartz Composer - it can do a huge amount of what I want to be able to do in the realms of visual art. To me however, the biggest problem I can see is that the authoring environment is not well suited to live performance, and yet if you create a standalone environment such as Eskatonia's excellent Quartonian VSM app, you lose the ability to add new nodes on the fly - which for me is one of the great advantages of quartz composer.

What is the answer? Maybe one option would be to embed as much of the core of quartz composer as possible into quicktime itself and make the actual authoring environment open source, so that inspired hackers could extend the environment in different directions.

On the other hand, perhaps with this technology looking to gain momentum, Apple could afford to be a little less tight-lipped as to the direction quartz composer is due to take!