[arch-general] Is Nouveau 2D or 3D acceleration driver for nVidia cards?

[Kelvin]

The description of package xf86-video-nouveau (
http://www.archlinux.org/packages/extra/x86_64/xf86-video-nouveau) is "Open
Source 2D acceleration driver for nVidia cards", but Arch Wiki(
https://wiki.archlinux.org/index.php/Nouveau) says that it is "Open Source
3D acceleration graphics driver for NVIDIA cards". Is there any mistakes?