I´m using this app with other media servers.

"Syphon is an open source Mac OS X technology that allows applications to share frames - full frame rate video or stills - with one another in realtime. Syphon gives you flexibility to break out of single-app solutions and mix creative applications to suit your needs. "

Personally, for me will be very interesting have this option in catalyst to use the output directly to other apps without external hardware.