Most "ergonomic computer posture" pictures (such as this one[0]) show that apparently your elbows should be suspended in mid-air.
Personally, I found this to be terrible advice. Instead, I make sure to have at least two feet of desk space in front of the monitor, on which I rest my arms. This also makes palm rests unnecessary.
I think this approach shares many benefits with that in the article you posted.
http://news.cornell.edu/stories/1996/06/chair-mounted-split-...
I think that's something from StarTrek that has not caught up.
http://www.cnet.com/news/mythbuster-adam-savage-builds-star-...