Add PowerPoint slide as a background in VCam - perhaps make a "Premium" feature.

I used to use Vidblaster and a green screen to display a PowerPoint presentation with my image seemless overlayed in a corner. I can get almost the same effect now with XSplit Broadcaster and VCam but not quite the same. The best way to describe it is that I'm looking for essentially Vcam, but using a PowerPoint as a back drop (so that I can easily point it items etc).