So what can you do with the pen?
Well, this is where the Samsung offensive starts faltering.
There just isn't that much the pen is useful for, because stylus-equipped tablets are so new.
You can jot down notes, or edit photos in an included version of Photoshop.
You can scrawl personal notes to people and email them.
Instead of using the on-screen keyboard, you can use handwriting and let the tablet interpret it.
You can even enter Web addresses this way.
Handwriting is slower than typing, and the tablet's interpretation introduces errors, so it's not clear why you'd use it much, though.
The stylus senses how hard you press into the screen.
Samsung's S Note app responds by making the line you make thinner or thicker, an essential feature for anyone who wants to use a tablet for serious drawing.
The pen also comes with a side button that works much like the left mouse button, giving access to extra features with little effort.
Very few third-party apps are designed with styluses in mind, but some of them work better with a stylus anyway.
Image: A journalist uses the "S Pen" with a Samsung Galaxy Note 10.1 at an unveiling event in New York August 15, 2012.