Unless somebody has a brand new 2009 to compare, kind of difficult. Displays do wear out over time, so a new 2009 will look better than a worn 2009.
When did Apple switched from backlit LCD to LED anybody knows?
The 2009 has a LED display, and I don't think they really wear out over time like the LCD fluorescents did.
IMO I have had a 2009 13" pro and a 2011 air and 2013 air. The pro seemed to have better colors, but it may have just been an illusion because of the black border. What I can say about the air is the resolution being higher is real nice and it does not have nearly as bad of a glare compared to my 2009 laptop.
Still pretty bad.
Really bad vertical viewing angles. To be able to get a good viewing angle you have to move the display towards you as if you were closing the lid. So it basically forces you to look at the display diagonally....like this...O _\ instead of this O _l
Resolution is good but quality is very bad. Every time I use my macbook air I miss IPS displays.