[all2]

This would be interesting for things like robotics and automation; think of a home() command for a mill center, or a lock-all-doors() command for a house, or bedroom-lights-on(), or make-cappacino(). I could go on.

Coffee on the command line sounds interesting.

This could also make GUIs far easier to spin up. A operation on the computer could easily spin up a 'new' GUI that depends on system / operation state using GUI objects available to the entire operating system.

[johnday]

Surely this is just a layer of indirection? It moves the onus for providing implementations of these verbs from software developers to the maintainer of the file type.

Personally I'd rather just stick to the existing analogue of verbs, which we call executables.