I am reading about "Ultra HD". Is my new HDTV obsolete already?

Your TV's not obsolete, but it will soon be a generation behind state-of-the-art.      

So, what does "Ultra HD" mean exactly?

Ultra high definition (UHD) is a standard that exceeds high definition (HD). The Consumer Electronics Association defines UHD displays as having a 16:9 ratio (the same as HD) and a minimum pixel count of 3840 by 2160. HD maxes out at 1080p, which is 1920 by 1080 pixels.

Okay, so 4K has a lot more pixels than HD. But is it really that much better?

4K images are composed of nearly 8.3 million pixels. Compare that to the just over 2 million found in a 1080p image, the full HD resolution produced by Blu-Rays. It's nine times as many pixels as a 720p HD broadcast. That's like the difference between an 8-megapixel camera and a 2-megapixel camera.

Can I even see all those pixels?

   It depends. The extra pixels make 4K images look great in the store when you're standing close to the TV. But if you expect to sit on your couch 8 feet away from your TV, you'll need a 55-inch TV or bigger to see the improvement. And the farther from the TV you sit, the bigger the TV you need in order for 4K to make a difference. The smaller your TV and the farther you sit from it, the less distinguishable individual pixels become. So 4K mostly benefits viewers who sit close to large TVs. But the Ultra HD standard is about more than just a lot of pixels. The video specs also call for a larger color space, which should make   everything look better even if you can't see all of the pixels.

That is all well and good, but it is not like there is anything to watch on 4K, right? house of cards 4k, Youtube 4k.

Like all other original Netflix programs in 2014, House of Cards will be shot and offered in 4K.Amazon, Hulu, Netflix, and YouTube have all announced that they will produce more 4K content beginning this year.