http://en.wikipedia.org/wiki/Bathtub_curve
The Bathtub curve originally described infant mortality but can be applied to electronics in today's day and age.
When the product is brand new there's a higher probability of failure, once it's out of the "new" phase the chance of your TV blowing up goes down drastically, then as it nears the end of its life the probability of a failure goes up again.
So most big box stores offer a year warranty for no extra cost, if you buy it on a major credit card that's usually extended another year. The 2 year warranty for a TV is all you need, never buy an extended warranty for a TV.
By the time it finally dies on you and you don't have a warranty to fall back on, it'll be an antique (in electronic years).
Ps. I LOOOOOVE my Sammy TV