I agree with most people here that it looks a bit lifeless, but i like the new color palette and atmosphere. I found Halo always way too colorful in everything, so its nice to see that changed and the game is still far from finished.
Its just more serious and grown up.
I love the color in Halo. It's distinctly what makes Halo Halo, and unlike any other FPS, which are all going "gritty" and "dark" these days.
That said, I dont mind too much the grittier direction in Reach for two reasons, one it seems they're pulling it off in style, and two, it's not "Halo 4", more like almost a spinoff, so for me them playing with the colors in something almost like a side mission is more ok.
BTW somebody on GAF who has it confirmed that the pictures in the Edge article are the same as in GI. Except some new ones that are "very small".