I support this request.
Notice that the 2 examples you propose use the same grid-component, cxGrid from Developers Express. This grid from Developers Express can even do a lot more then you mentioned. It supports grouping (look at your examples) on multiple columns, summary in grouping, Order By Group Summary Values, order by on multiple columns, export to a whole range of formats, filtering, column-bands, etc, etc...
I have asked this User Interface update more then a year ago. I think that the grid they use now is obsolete and should be replaced by something better.
Why they still haven't updated their ancient grid is beyond my imagination.
Roeland
PL/SQL Dev 9.0.0.1597