As far as I've experienced, most major US airports do this. I suppose the purpose is to easier let people find their flight.
I can see how this might work, but I annoys me so when I get of a transatlantic flight in the US, all disoriented and tired, and try to find my connecting flight, look at a screen where I can see one or two flight departing around the same time as my own, and only see flight to New Orleans! And then, of course, it dawns on me, and I feel stupid.
I much prefer the European (And rest of the world's, I might add
) way of doing it.
Sure, we're concerned for our lives. Just not as concerned as saving 9 bucks on a roundtrip to Ft. Myers.