You are aware that this blog post is about displaying syntax highlighted code on the web? This is literally explained in the first paragraphs of the blog post..
As of now there were four ways of doing that:
1. using an image (which sucks)
2. manually setting the colors (good luck)
3. Generating the syntax highlighting server-side (preferred, but you need a backend that can do it)
4. Generating it client side using JS (waste of energy, takes a time to finish)
And now a font. Depending on the use case this could be a feasible option, although I am just waiting for this to be exploited in some fashion.
I still think computing once styling later is preferable.