Yeah, doesn't look right. First off the Detroit car had red seat bolsters, secondly the flooring doesn't match unless this was a private showing before the official announcement. Thirdly, the front air dam and cooling vents look like the ones on the Chicago car. Not to mention the inconsistant shadows.
UPDATE: According to MT, photo was taken at a VIP reveal in Detroit in mid January. Looking at a less cropped photograph shows shadows more appropriately. Others photos shows him standing next to a first gen NSX at the same event. This however does not explain why the new NSX differs from the one at the stand at the show unless Honda brought two cars.