To compare HD with 4K, it all comes down to how much information is gathered for each frame. HD tops out at 1,920 x 1080 pixels per frame, or about 2 million pixels per image. 4K tops out at 4,096 x 3,072 pixels per frame, or about 12.6 million pixels per image. Simple math indicates that 4K has more than six times the amount of information per frame than HD does.
What does this mean to you and me?
It's very simple: All this extra data means we will see clearer, more realistic images with 4K than with HD. Also, when it comes to creating 3D images, having more data will allow it to be more realistic. 3D is still struggling, but as soon as the technology appears where groups don't have to wear glasses, I predict we will see virtually every movie and video shot in 3D.
So far, the only people using 4K gear are professional videographers and filmmakers. There's no real consumer equipment available. Even if there were, there's little to no way to obtain 4K content.
But I recently did have a 4K experience. The Bow-Tie Cinemas in Trumbull, Connecticut recently opened up a Bow-Tie Extreme, or BTX, theatre. Not only does it have a 2,000-square-foot screen, a 30,000-watt sound system and very cushy seats, but it sports a 4K digital projector. A few of my friends and I went to the BTX theatre recently. Watching some of the "warm-up" stuff was pretty uninspiring. The video was kind of grainy and the sound was disappointing.
Then someone seemed to flip the "4K switch" and the theatre came alive.
The video was spectacular, as was the sound. All sense of digital grain was gone and the images were astonishing. The sound had far more depth and clarity than I had heard in a long time — certainly from a local cineplex.
While Bow-Tie does charge a few-dollar premium for its BTX theatre, it's worth it for the truly big-screen movies. But I like movies where there are plenty of spaceships, car chases and things blowing up. Big screens and great sound systems always make those movies worth a couple of extra bucks.
Eventually we will see 4K sets in our homes, but it will be a few years, I predict. The challenge is the lack of 4K content, plus the ability to deliver it to us. DVD players — even Blu-Ray — don't have enough space to store 4K movies and I think Cablevision would have a problem delivering that much content to people over its Internet services.
But I like going to the movie theatre and am quite happy to have the 4K experience from time to time. I can wait for a few years before it shows up in my home.