The writer, Seiji Nakamura, laments a severe visual downgrade from what he experienced at E3. The gist of the problem is that in the Forza 5 corner of the Microsoft booth things looked so bad that the monitors seemed badly adjusted. Aliasing and jaggies were standing out.
In the Forza 5 press room the situation was even worse, with the picture quality defined as rough like what youd see if the output was 720p, with a definite visual degradation from the E3 version.
Nakamura-san continues by saying that the quality simply wasnt the same as the original Forza 5, and the version he tried at Tokyo Game Show did not reach the level of the screenshots of the game at all. He actually asked a the Japanese product manager for the game bout the problem, and all he was told is that the folks at Microsoft are aware of the problem.