The comments are the article express all of my concerns the main one being the javascript and screenreader requirements. Take a look at them to see their insights into the example.

I dunno if I agree this one. Too many options is overwhelming, but it would work a lot better if the box stayed open when you clicked on it.

What this is going to solve? It's just less usable since you need to open the tabs to look what's inside.

Collapsing DIVs solved this problem a long time ago, and they don't break tabbing or require ugly hacks.