Originally Posted by Bigus
Yes. Just seems a bit behind the times.
Not at all. Both organizations have established standards so that home theater enthusiasts and installers can aspire to recreate the theater viewing experience. Width makes much more sense than height when discussing viewing angle and field of vision. It's also in accord with how predatory mammals' peripheral vision and central focus is oriented horizontally in order to detect horizontal motion of potential prey. That suits humans' physiology.
Basing distance on resolution is a nice idea, but iy isn't something I've worried terribly much about since 1080p became common place. If you do the math and want to push the 60 deg size, then 1080 doesn't quite cut it. But few people push that limit, and even then with 4k pj's on the horizon I think its much easier to build a screenwall and room around viewing angles with perhaps a pj swap when feasible than to design and build around resolution and face a redesign and rebuild when higher res pj's become affordable.
It depends. I've tried to use that chart, or at least information gleaned from it, to explain to friends and family members in the market for a new flat screen TV that below a certain screen size (e.g., 42", or possibly even up to 50"), there is no benefit to paying a premium for "full HD" (nothing but a marketing buzzword), a/k/a 1080p, vs. a comparable 720p TV. To the extent that some television manufacturers still produce some models at 720p, depending on viewing distance and eyesight, 720p makes more sense (saves $$$ at purchase time, even in 2012) over 1080p in the appropriate circumstances. Increasingly, this is getting to be a moot point as fewer and fewer 720p models are available, but smart buyers who actually listen and understand the point can save a few hundred bucks. I did when I bought my last two 42" plasmas.