An interesting video appeared on YouTube that compares the graphical quality of Ubisoft's E3 demos and the final versions of these games. In some cases the downgrades are pretty stunning, this has often lead to complaints from gamers as the retail versions fail to live up to the hype.
Comparison between E3 demos and retail version of recent Ubisoft games. I encourage you to not only focus on textures or lighting, but also on animation, level design, assets, physics, and sound. Recorded in 1080p at max settings on PC with a controller.