It just looks really good. Not slighty bettter graphics, extremely better graphics. Of course you'll get your videos about the inrace interface, but they just want to show off what there main focus was for this version.
The main focus is on improving the environment. For my money, the environment already looked good compared to the riders. All they've done is increase the already exsisting gap between the riders and the environment.
What's the point of focusing on rain if nothing looks wet? There is a good fan base already for the game - and while I understand nice graphics will mean more people being attracted to the game - it would be nice for already exsisting fans of the series to get something substantial to look forward to in the 'official' promo material.
Even if they want more people to buy it, why not focussing on the 'Riders ride through each other' thing? I know many people who say that's really unrealistic and weird...And it definitely is unrealistic and weird.