With HDTV's it's not too extravagant either - about 3345 panels. A lot (of drivers too) but doable.
Any support for it? I was thinking that a circular dome ring of panels would be an amazing visualization tool.
1. current age of every person, represented by color
4. State (health, nourishment, etc)
But then I run out - but I think it would be an incredible tool for a variety of data sets.
You could start smaller too (country level)
Has anyone done this yet? I'm aware there are no new ideas on the Internet.
The problem with this kind of simple scatterplot is that there is an maximum density that you can represent, when the dots start to overlap. And you can't tell what that maximum density is by looking at the map, so it in effect misrepresents the data. The example in the article compensates for this by allowing zooming, but the problem is still there at most zoom levels. To avoid this you need to use one of the techniques that tessellates the plane and colors each tile according to the average value in the tile.
I wish my own U.S. History course would have covered ground like this instead of starting in the early 20th century with the plight of immigrants. No independence, no civil war, nada. I felt cheated by that (high school) course and I've been meaning to fill in the gaps.
To be honest, most schools that do cover those do an even worse job than not teaching anything at all.
If you're interested in filling in the gaps on your own:
CBS Sunday morning had a piece  on the whole deal with people building homes in national parks.