In the Phase 1 renders, these pre-cast concrete blocks appeared to be flat. Glad to see they added some dimensionality to them. This project might be undergoing whatever the opposite of the cheapening is. Really bodes well for the rest of this project, as this is arguably the least impressive of the three proposed towers here.
You're mixing up the elevations. The panels they've put up on that elevation are indeed flat, as shown in the rendering.
Some of the strips start out pointed, some of the strips start out flat, and it looks like the vertical lines transition at various points up the elevations. Even in the rendering you posted, you can see that the left-most strip becomes pointed near the top of the image
Those look like metal panels to me. Their surface is too smooth, uniform and reflective to be precast concrete. Also, I've never seen precast panels pre-assembled with glazing panels like that, only metal ones.