I’ve been kind of a d*ck about the game look but truth be told, technically-wise it has some stunning tech on screen.
The moment the player is about to get in control, you can perfectly see in the lower-right side of the screen how shadows are moving as the global illumination and the fast-spinning Halo naturally provoke a beautifully accelerated day-night cycle. You can also see in the same gif how subsurface scattering makes the light go through the trees leaves.

It is pretty noticeable how fast is the day-night cycle looking at the sun position. Across the gameplay, the light becomes more and more orange as the sun fades, but you can actually all of the sun when he just goes up in the elevator, and then how the sun is partially hidden behind some damaged part of the ring:
This level of illumination is very demanding for the GPU and I think it’s going to give us lots of beautiful landscapes.
I’ve also noticed some brute armor parts would fall under fire, but others just dispel like promethean enemies dying, they may be using promethean tech:

They carefully took care of the physics, Halo 2 and 3 (and 4?) classic explosive fuel tanks can now be pierced and be propelled by the burning fuel coming out of this holes. For example, in the next gif you can notice a green flare in the back, that’s a dead grunt’s respirator that just exploded, and out of sight, next to it, there’s a fuel tank. The respirator explosion pierced some holes on it, so it just flies propelled by this holes and explodes in the air:
You can also see some other pretty cool details, like some particles bouncing, everything being reflected on the water where the Chief kills the first grunts, or a wheel on the warthog being lost when a suicide grunt explodes just next to it, a brute tripping when it’s shoot in the leg, other bringing his hand to his hurt back when it gets a shotgun shot from the back, etc.
