I don't care for the continued use of that indeterminate shiny white material in building human structures, or the way it's all curvy for no apparent reason. The luster of it feels like a default setting from Maya, and it doesn't seem like it looks like any material I know of except maybe some type of plastic, and using it instead of some readily identifiable material feels lazy because it lets you omit almost all details. Presumably it's supposed to look futuristic but it just reminds me it's a game. Maybe it's changed, but that's how it struck me in Halo 4 quite often and the small images in the article make it look like it's the same, possibly even worse.
I like that we're getting a look at a glassed planet though.