Not all TV mounts are the same. There are plenty of cheap ones that only offer you one viewing position. The PXRU mount is different as it serves as an automated swing arm TV wall mount to offer you tilt and swivel capabilities, so you can see your TV from anywhere. The arm extends up to 27″ out from the wall and goes back to 4.5″ when not in use. You also get a programmable remote with 4 presets, so you can save your preferred viewing angles.
The mount weighs 71 lbs and has a weight capacity of 150 lbs. It can handle TVs up to 65″. Not cheap though.