The problem is the comparison point.
When original Gtk/Gnome came out, it was a WAY worse BPOS than Unity or Gnome 3 are today.
The trick was that when Gtk/Gnome came out there was no existing solution. So, even a bad one was okay.
The problem is that the new solution is competing against an existing solution that has more than a decade of development behind it.
It would take a Herculean effort to win that comparison.