With all of the noise about digital TV and high definition, the truth is that outside of sports, I'm not sure you get a lot of real use out of higher resolution video. Most stuff just isn't that interesting to look at.
I suppose that's why the BBC's Earth series has been such a good seller in the HD formats (RIP, HD-DVD). The more that I see in high definition, the more I see that documentary stuff is the most interesting. Like tonight, there was a show on Discovery HD Theater about the building, testing and launching of a destroyer. The detail in the welding, threading on bolts and the texture of steel surfaces all feel very life-like in HD. That's good stuff.