6 Segment color wheel for better than average contrast compared to the previous 4663w model. Newer chip, i believe it wobbles faster to give you more coverage of pixels on a small chip

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Its a HELL of a lot more low profile on the edges than the previous model, not quite as deep. It costs about 500-600 more.
I think since its so low profile, a lot of people, especially women complain that it looks small. (fans of the crappy painted silver sony speakers on the sides?)
I think its pretty good, but you can get a 5663w for the same price, its the older one, but 10'' bigger.