I'm pretty sure the plan remains to cover both those solid black panels and the glass windows with perforated aluminium panels as per the planning application, to give it a consistent appearance.Don't think those black framed windows are staying mate unless there's been a design change. I'm pretty sure the way the all black panelling looks on the West Stand is how it's going to look all the way around.
Hope I'm wrong like and rheuve made a design change as I think the framing of the windows on the North and South stands looks boss as well.