More info here.
Oh, and there's an additional pandemic in the wings in the form of a new swine flu.
HDMI from the camera likely is still trying to do the HDCP handshake. SDI does not support HDCP, so the best that you would get is audio only. Some HDMI to SDI converters act as the display (for HDMI v1.4) and can thus pass the signal down the line. These are technically not HDMI compliant.
Green screens will still be a less expensive option, so yes, they will still be around. I do believe that this will be much more common for larger budget productions and will work its way into live entertainment.
Teradek is something that I have seen demoed on a Vegas convention floor (very RF noisy environment) and it worked great in their 20x20 booth, where I have seen other wireless applications fail. They are often used in broadcast situations. And the delay was not noticeable at all. It really...
Honestly, I think that is too specialized of a product, especially at that size.
One thing that you will want to consider is that high gain (transmittance) rear projection has a narrow field of view. I have not used any black screen material, but have used high gain grey rear projection and...