The runway is being constructed because of the new FedEx hub that has been built at GSO. This should make for some pretty amazing plane watching, as FedEx uses big planes (A310s and MD-11s, among others). As a hub, they'll be coming in and out frequently. With that and the Honda Jet factory based on the field, GSO is really emerging as quite the contributor to the aviation industry in NC. Pictures Below...
Kind of hard to see, but here is new runway 23R at GSO
Freshly built FedEx hub. This will make GSO a good plane watching airport.