When recording in my studio, my workflow is to have the camera connected to an HDMI splitter.
One output goes to a large monitor for checking focus and framing - and the other goes to a Black Magic Intensity card, currently connected to a MacPro with FCP7 (but soon I'll move everything to AE/Premiere on Win7 where I'm doing all my R3D file editing) where it records ProRes 422 HQ.
With a 'normal' camera, recording the hdmi feed bypasses all the mpeg compression and gives you true 1920 x 1080 from a DV camera.
I can record the session in 1080p with sound and immediately review the take on a large monitor with studio sound monitors.
Most of my takes are very short, but they need to be perfect. If I don't like a performance, I can immediately show the talent what they are doing wrong, and get them to correct it.
It's great to be able to look at a high quality version of what was just shot immediately, without having to deal with pulling R3Ds off the flash. I'll know exactly what a debayered output will look like (and sound like), in advance.
My hope is that when the 1080p24 is working, that I'll be able to do this with the Scarlet.
The Black Magic card in the Mac Pro won't record 1080p60, so I need to get the Scarlet to output at 1080p24 or hopefully 1080p23.97. The same goes for the Matrox MXO2, it won't work at 1080p60.
Unless there's a problem with the R3D files, I doubt the 1080p recording will be used for anything but review, but ... it never hurts to have a backup for video as well as sound (as some are reporting audio synch issues lately).
I'm toying with the idea of doing this in the field also, using a Win7 laptop (and external monitor) and a Black Magic USB3 Intensity - as I've gotten used to having a large monitor when recording.
The laptop would serve double duty for pulling R3D files off the flash cards to back them up and recycle them.
I think one of us is confused - very probably me - but I don't see how the electronic refresh rate of the monitor (in hertz) is related to the actual frame rate of the video. Isn't the refresh rate of the monitor related to the electrical pulse carrying the signal? Don't televisions and typically refresh the signal at a rate that is a multiple of the electrical signal: i.e. 60, 120, 240 in the U.S? Like I said, I could be confused...