From HTML5Doctor comes the news — the
<hgroup> tag is obsolete and is not to be used.
The spec., rather an “Editor’s Draft”, offers advice on how to mark-up subheadings using here-to-stay elements, under the subheading “Common idioms without dedicated elements”.
For example, use this mark-up…
<h3 style="background-color:#E3E3E3;padding:1em;">3D films set for
popularity slide </h3>
<p>First drop in 3D box office projected for this year
despite hotly tipped summer blockbusters, according to
Fitch Ratings report</p>
…to get this display:
Can’t say I’m going to miss it.