Motorola, now a part of Google, chose to post the demos to their Japanese RAZR site. That makes sense for some of the videos, as they are in Japanese, but others are available in English, so it's strange that Motorola didn't post them to its U.S. site.
In terms of showing off features, if you have been lusting after Ice Cream Sandwich, you probably know about all or most of these already, though with customizations per device and OEM, it's always to see how the device manufacturer has chosen to implement the feature.
Motorola, for one, has a feature that no other OEM has, and that's Webtop. With Webtop, you can insert your smartphone in a Webtop dock and voila, it's like having your own laptop powered by your smartphone. This feature was introduced with the Atrix.
Another useful ICS addition is shown in the demo videos is the data usage feature. Considering the trend toward data tiers and all, the ability to monitor data use comes in handy. In ICS, you can monitor not just overall data use, but app by app data use, especially handy to discover who of your apps is more of a data hog than the others.
Take a look at the full set of demo videos below. Remember that many of them are in Japanese.