1. The S Pen

Richard Drew/AP

Samsung changed the color of the S Pen that comes with the blue Galaxy Note 9 — rather than matching it to the phone's finish, the new S Pen is a contrasting bright yellow (with any of the three other colors in which you can get the device, the S Pen comes in a matching color).

But beyond changing the color, Samsung upgraded the S Pen's insides, too.

The new S Pen has Bluetooth Low Energy, which means it can work with your phone up to 30 feet away, allowing you to use the S Pen as a remote — click the button on the stylus to take a photo, change a presentation slide, or pause and play music and videos.

If there's one downside, it's that the new S Pen will need to charge from time to time. Thankfully, it does that while clipped in to the Galaxy Note 9, and Samsung says you'll get 30 more minutes of use after 40 seconds of charging.