Unlike everything else, with 4 HD-SDI inputs, Catalyst is a full blown switcher now and something beyond what most show switchers could ever hope to do.
I've even been thinking up ways to develop value added application interfaces for Catalyst that include switching hardware so that potential users could have a virtually unlimited switcher.
It's easy. Four inputs means an upstream key, a down stream key, and two layers in the middle for live/preview. Not to mention the other 12 layers of simultaneous video playback and the ability to display on six screens with the use of two Triple Head 2 Go boxes.
It's a super HD switcher and if we were to add a 16x16 matrix HD-SDI switcher with serial control from the serial within Catalyst then we're unstoppable.