Not that it does no better than the regular dirt-cheap keyboard. It is an improvement over that. But it still have those damn keys slanted towards the left for both hands. We could do better: http://loup-vaillant.fr/articles/better-keyboards
I also hope he started using a Dvorak layout or similar. The learning curve is not cool if he already types fast, but the gain in comfort is noticeable.
Many people seem to believe that slanting the keys to the left is actually more ergonomic than a straight "matrix" design. And I think manufacturers aren't willing to risk selling keyboards that don't have the usual look.
The natural keyboard is no different. They sell one idea: splitting the keyboard. The rest doesn't change because it would spur too many questions, and maybe cost them customers.
They probably want backlit keys or macro buttons.
(Not that I wouldn't mind a Kinesis, but those weren't available when I really needed one).
In regards to OS support, the only OS I have really had problems with is Windows. Maybe I just wasn't checking the right checkboxes, but Windows seems to default to "I assume you want a different keyboard layout for each window, so have fun with that!" OSX and Linux have always been very sane, defaults-wise.
Changing layout on OS X and Gnome (I'm not sure about Win) is quite fast, usually if I need to type on someone else computer for more than 10 minutes I tell them and change it.
Also even if I've switched to Dvorak a year ago I can still type at a good speed on qwerty.
I've been using Dvorak for 12 years. Initially my QWERTY speed was seriously hampered, but after being in environments where switching was less convenient (public labs and the like) it recovered.
The key is the switches, and anything that uses mechanical switches will almost automatically feel better to type on than keyboards that do not.
<EDIT> Ah, according to Ars "How loud is this product? Very loud". So for my situation (quiet open plan offices usually), probably no good.
Also, if you want a quieter keyboard but still want mechanical switches, you can go for the Rosewill keyboards with Cherry MX Brown switches - it gives you a tactile bump, but no associated "click". You'll still make a lot of noise if you bottom out, however. If you get out of that habit (easier on your fingers, by the way), they're quiet as a mouse.
See this for an example:
For the same reason, a pianist doesn't need to look down at the keys unless he's making a large jump across the keyboard (and even then, muscle memory often serves him well).
Nor does a guitar player need to look at the strings he's picking or fingering. A common technique is to anchor your righthand pinkie on the soundboard to serve as reference point ("home key"). From there, your muscle memory knows the rest.
When playing the guitar, you can't see what your left (on the fretboard) and right (with the pick) hand are doing at the same time so muscle memory is the only viable option.
Similarly, you can't really see what your hands are doing on the keyboard and what is actually being typed on the screen so you have to pick one to choose. Looking at the screen is the obvious choice, but for typing practice you might actually want to look at your keyboard.
I learned more ergonomic touch typing using two tricks. The first one was to train using the Dvorak keyboard layout, although I don't use it normally. It just made me hold my hands in the right place on the keyboard. The second was getting a blank keyboard with no inscriptions on the keys and look at the keyboard, not the screen when typing.
Also, musical instruments are more consistent than computer keyboards. I play saxophone, and it's easier for me to move back and forth between soprano and tenor sax than to move between desktop and laptop keyboards.
The downside is that I'm always frustrated when I have to use someone else's computer and I'm toggle caps all the time.
But when I have both hands on the keyboard, it feels better to use the left control key, maybe because it's more symmetric with my right hand.