Gamers in Japan can check out 2D and 3D trailers from the conference directly on their 3DS.
Nintendo 3DS owners in Japan can watch various video clips from the 3DS Conference. The videos are divided up onto several pages on the eShop. After scrolling to the right of the Nintendo Ambassador Certificate page, users can view a 2D compilation trailer of all of the announced titles that were made at the conference. The run time is a little over two minutes long.
After continuing to the next page on the right, you will come across a page featuring 2D streaming trailers for many (if not all) of the titles shown and developer interviews about titles such as Super Mario 3D Land, Mario Kart 7, and even an Animal Crossing Roundtable of sorts. The videos vary in length from one to upwards of ten minutes long.
Lastly, 3D trailers are available to download directly to your 3DS. They are broken up onto two pages, with 15 on the first page, and 14 on the second page - a total of 29 videos available for download. Nintendo did something similar shortly after E3 on the eShop in Japan. There is no word whether or not these videos will be made available on eShops outside of Japan.