Here are the UX upgrades that Samsung is bringing with the newest iteration of TouchWiz

Connect to other devices
Samsung's SideSync has been present on its smartphones for a while now, but it it has, together with the Samsung PC companion software, received another rehash in order to make connections easier, and more seamless. As you can see in the video below, you can now wirelessly connect your phone to your laptop and use Sammy's proprietary program to mirror the handset's screen on your PC display, get notifications, and transfer files with ease.
S Pen
The S Pen is what sets the Note line apart from any other tablets and Samsung, naturally, continues to improve it with every new iteration. This year, we are treated to a stylus that is closest in appearance to an actual pen than ever before. It's not all in the looks, of course – the way S Pen works has been tweaked as well.
For starters, the new Air Command menu is now a persistent tool that constantly floats on top of the screen – kind of like a Facebook chat head. It can be dismissed at any time by flicking it to the top of the screen. Should you need to recall it, a simple swipe with the S Pen's tip over the screen will do that. Tapping on Air Command's persistent bubble will open the full menu of functions.
Last, but not least, it will now be easier to take Action Memos directly on the lock screen, as the user can pull out the pen and start typing on the screen while it's in an "off" state. The pen will leave white traces on the black background, saving both battery and time.
Broadcast to YouTube
The new Camera app will allow users to broadcast to YouTube directly from their top-shelf Galaxy smartphones. The max resolution this mode would support is Full HD – 1920 x 1080 pixels. As with any regular YouTube stream, you can schedule the broadcast, you can choose it to be saved on YouTube's servers, and you can control the stream from a PC by visiting the website while still streaming from the phone.
Samsung Pay
Samsung Pay was also demoed, as it approaches its own launch. There is pretty much nothing vital that we don't already know about the system. It employs your phone's NFC and MST connectivity, so a payment is done by bringing the phone near a terminal and holding your thumb over the fingerprint scanner. Something really cool we can see in this video is a shortcut to bring up Samsung Pay's credit cards.
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