Here's a general overview of the new CAME-TV Crystal 800 Wireless Video Kit. Besides being rated for up to 800 meters, the stand out feature for this kit is that you can also use an iOS device such as an iPhone, iPod Touch, or iPad as a wireless video monitor displaying the feed from a remote camera.
While the long range and ability to monitor through an iOS device are appealing, the Crystal-800 is not meant to replace higher end units if you want to record high quality from the video stream. While the transmitted image comes in clear and sharp, it does not appear to be uncompressed. Also i've noticed that certain framerates (i.e. 24p) that are input into the transmitter seem to end up as 30fps on the HDMI output of the receiver. You can also enable Audio to be be transmitted, but keep in mind that it is compressed audio but should be good enough for basic monitoring.
If your main goal is simply to send video from a remote camera to a director's monitor, I think the Crystal-800 is an excellent system. You don't even need to build out an lcd monitor with a cage. You can simply have the client monitor from an iPhone or iPad.
The Crystal-800 would work fine for Gimbals or Steadicam systems where the camera is constantly roaming. And even though the image sent is compressed, it should be clear enough for a basic multi-cam live stream setup to Facebook or Youtube. The Came-TV Crystal-800 Wireless Video system is available now over at their website (Found Here).