In addition to Wally's post, we already have the technology to build "directional" runways.
What i mean is a spherical runway design where by assistance of hidden lighting we could change runway directions like a compass to ensure landing always in to wind.
Of course this would require a concrete circle of at least 3 kilometer radius. But imagine the money could be saved if all airlines contributed to construction to save circuit time because all approaches would be straight in.
Just a thought.
