How much do green screens cost?

Who manufactures the large touch screens used at news channels such as CNN? How much do they cost?

• I have noticed that there are some large touch screens that are used by news channels while presenting weather, election analysis (with a large map of the area) and other similar applications. Would like to know who manufactures these, whether these can be bought off the shelf, and possible pointers to how much these cost...

• Answer:

  The 82" and 55" multitouch screens are manufactured by the company Perceptive Pixel founded by Jeff Han and acquired by Microsoft in 2012. They are currently sold for businesses and can be quoted on the perceptive pixel website: http://www.microsoft.com/office/perceptivepixel/. The 55" is supposed to cost around $7,000 so my guess is that the 84" would cost over $10,000. (source: http://thenextweb.com/microsoft/2013/03/08/microsofts-perceptive-pixel-premise-the-future-of-touch-computing-isnt-stuck-in-your-pocket/#!tmwZy)