Killer App of Existential Programming?

Ok, with all this theorizing about "existential programming", what the heck is it good for?
I.E. What is the killer app of existential programming?

The answer could be "integration of uncooperating systems"...

• Data Integration
• Data Model (i.e. schema) Integration
• Application Integration
• Frameworks API Integration

By developing an information (code/data) environment where different paradigms can coexist without even being aware of each other, uncooperating systems can be mediated between that otherwise could not.