What you'll notice is a globe that responds to mouse dragging just like Google Earth - in fact I believe GE, at least initially, used a version of WebGL. The main advantage for presentation is better shading - Gouraud shading rather than the rather kludgy HTML5 canvas version.
A downside is that support for WebGL is quite patchy, and implementation depends also on your graphics card. I've found Chrome is fine; Firefox produces a fragment of picture and then gives an error message, and of course IE is way behind. Some other browsers have the capability but disable it by default. I understand the reason is that it creates a vulnerability to DOS attacks which send dynamic but very slow pictures.
I don't think WebGL will replace my HTML 5 versions for a while. I don't have as much control, so I can't, for example, allow you to click on the picture to bring up local station info.
The other downside is that the files are fairly large, and take a few seconds to download. So I've put them below the jump. There is the WebGL version and a snapshot of the HTML5 version. The color scheme is the same - I haven't figured out yet how to put a bar on the WebGL version. It's a direct plot from the TempLS September station anomalies - exact for each station, and shaded elsewhere.
I've added a technical update describing the methods I used here.
So here is the globe. Give it a spin! The left button rotates, the middle button/wheel enlarges, and the right button changes field of view (which can also enlarge).
Here is a snapshot from the HTML 5 version. You can see that the shading is more ragged.
I should say more about how this is done. I use my R program which does the interactive monthly presentations, in conjunction with an excellent R package, rgl, in which Duncan Murdoch has a big role. This enables me to show in an R GUI the spinnable globe as you see it (browser permitting).