If the analog sunset happens as is planned at the end of 2012 there's going to be people looking for a way to send their high def signal from source to screen without using wires. The analog sunset means any high def signal that is being run through component video will be downgraded from 1080i to 480i. It won't happen with your Blu-ray player unless you load a disc made after a certain date, but the cable and satellite providers are set to shut off your analog HD signal. They can reach right into your set top box you know.
In a number of situations it'll be difficult to run an HDMI line to the TV or projector. That's why these wireless solutions are so important. Here's a good story from trade publication CE Pro on a number products which do just that, 14 Wireless HD Options.
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