There's absolutely no point having several workspaces, if the taskbar stays as crowded as it was when everything was running in a single workspace.
Obviously the author of the article gets pretty worked up about how M$ came to this design choice, because he doesn't seem to like it much.
Maybe they haven't asked enough people from a group representative of their typical customers, but nonetheless, this - for once - was exactly the right decision to make.
(Comparing it to manga wallpapers and Metro is a bit far fetched, really.)
Maybe the author should get in touch with M$ and ask them to add a tickbox to alter the way the taskbar works, as it seems easy enough for small groups to influence them... according to the article.