My guess is that the demo was DX11. We'd been told there'd be a DX11 version. My guess is also that the DX11 version was canceled, likely due to resources, and the console version (which was crappy to begin with) got ported.
We last heard that the DX11 version was in the works in November 2011 I think (could be wrong.) So... depending on when that demo was shown, it's possible that they knew that version was dead.