There are mounting brackets available for almost every size of flat panel tv monitors available. At www.bestbuy.com one can buy a bracket that will accomodate up to an 84" flat panel tv.
The largest screen size available in the Samsung plasma Tv line is 102 inch plasma Tv,which might cost you around $45 000 which is very expensive. But its up to you.
The size of wall brackets will depend on which plasma t.v. you own. Every brand will have a slightly different mounting size for the brackets, so make sure you use compatible sizes.
The largest screensize available in this line is the 90" AQUOS LED TV (introduced in June 2012). This TV is also acclaimed as the world's largest LED TV.
The Sanus LL11 mount holds a television with a screen size up to 70 inches and 130 pounds in weight.I believe this is the largest plasma television wall mount available.
Plasma televisions are some of the newest technology available. They can range in size from thirty-two inches all the way to sixty inches. Panasonic as well as Amazon have many options to choose from.
Toshiba currently has televisions with screen sizes (diagonal) from 23 inches to 65 inches. The largest model they make at this time is the Toshiba 65UL610U, a 65 inch screen that retails for about $4,500.00.
Popular Science Sep. 1980 shows a 45 inch television set. This is the largest size my research has showed so far.
the biggest TV you can get without compromising the quality is the 82 inch version of LG tv. it has all the features you could ask for and retains the quality picture.
Sony's largest video display is called the Jumbotron. These are the outdoor displays seen in sports stadia, concert venues and commercial centers such as Times Square in New York and Piccadilly Circus in London. The screens are built to order from many small modules so the size is as large as a client wants. As these same screens can be used in temporary venues, the size of the largest screen can vary depending on the largest temporary installation. Size of 40 yards or 40 meters wide are easy to achieve with some being larger still. Whatever the current largest size is, you can be sure that you can always get a screen that is large enough for your own home theater installation.
Wall mounting brackets for large LCD TV's can be had from most electronics stores, i.e. Best Buy and the like. They can also be purchased at Wal-Mart, Target, and other super stores. In addition, Home Depot and Lowes carry them, so you may want to check other local home improvement stores.
Depending upon the size of your tv, certain brands of television mounting brackets will serve your needs better than others. Another factor is the price you are willing to pay for it. Comparing various electronic manufacturers is the best way to determine the one for you. www.nextag.com
The record holder for the largest television is Porsche. The automaker recently unveiled a 201 inch television in Austria. It was originally marketed for private yachts but also can be used outside for various types of screening events.