Okay, so the Nexus One has a OLED screen.
Ars has
reviewed it, but the relevant image is this:
It's the center one - notice it's lighting is considerably less harsh and washed-out! (The left is CCFL lit, the right is very early LED-lit)
So yea, modern LED lighting makes a
massive amount of difference, but the settings made are equally important - you can adjust OLED brightness downwards *far* more than CCFL's, and the Nexus One has a light sensor which auto-adjusts.