http://english.chosun.com/site/data/html_dir/2011/08/25/2011082500556.html
http://blogs.wsj.com/digits/2011/08/23/samsung-cites-sci-fi-classic-in-attacking-apple-patent/
It seems like Apple is suing anyone who uses a capacitive touchscreen, both smartphones and tablets , because they claim to have patents on how to use a capacitive touchscreen.
Samsung is citing that in the 1968 film 2001: A Space Odyssey, touch screen tablets already exists. So at most Apple tablets is imitating the movie, which should not be patented and everyone else should be free to do the same.