I know what it is oldsmoboat, but the problem is there isn't one "standard" for that yet. It is like saying "I want a computer with an OS on there." We need to know what OS- OSX, Windows, Linux, etc. It is not like USB or HDMI where one size fits all.
Apple phones have Airplay which only works with an AppleTV, Samsung has AllShare which works with their devices only, and then on the side Google has a Chromecast that can mirror apps that have that compatibility built in.
So basically what I am asking is:
-What is the device you want to mirror?
-If it is a Samsung device, do you have to have that functionality built in or are you willing to let something else like a Chomecast or a Samsung Blu Ray player do the job? Because if not basically your set of options is limited to more expensive Samsung tvs.