Windows 8 Consumer Preview　Official Demo HD
http://www.youtube.com/watch?v=nMxhopm6Roo

新しい第三世代「iPad」の新機能まとめムービー
http://www.youtube.com/watch?v=kBMNtYuL-j0

Features of Android 4.0 Ice Cream Sandwich
http://www.youtube.com/watch?v=lyaM_ELQIwY