On a similar topic but different item, full screen video within the Blackmagic Express software would be awesome. If I have a quad or octa projector design being blended on the computer (no hardware blending) and I want to display a 3G SDI source on the screen, I have to do some funky 3G-SDI to DVI adapting with a DVI capture card to make it happen. Too many points of failure. Would be great to be able to take a 3G-SDI or Fiber input in to a system directly and have it display full screen. That would then scale across all of the blended projectors without having to move to an external blend solution.
Quick edit... For those wondering what the heck I'm doing, here is a public image of the screen we're broadcasting on. This is just under 4k resolution driven by 4 projectors.
It does span wall to wall but we don't have all of our interfaces online for this particular shot. You get the idea though.