One of the questions after the Crytek 3 engine unveil a few months back was whether or not the screenshots and video were actual gameplay footage or were souped-up engine demonstrations that didn't actually show what players would experience. This playtest definitively confirms that the company wasn't lying about what it could accomplish with the new engine. Feast your eyes.
This particular map is rather dark and foggy, but that fits thematically with what's happened to this section of New York City. According to the game's plot, New York City is now covered in a "Nanodome" and has literally become a concrete jungle. Jungles can be vibrant, colorful places -- or they can be steamy, foggy, swamps. What we've got here reflects the latter more than the former, but Crytek has stated that each section of the Dome has its own unique look/feel.