This won't happen, Styluses is from the 90's: iPhone 6 Pro has built in iStick stylus

Phone Reviews:

The concept design comes courtesy of ConceptsiPhone and features a stylish looking iPhone 6 Pro. The device features a 3MP front facing HD FaceTime camera with the handset measuring only 7.2mm in thickness. At the bottom of the handset below the home button we have a notification light, and on the side of the device is what is being called the iStick which is basically a stylus that extends once taken out of the handset.

This won't happen. Styluses are from the 90's and Apple will never do that. Using a stylus is one of the worst user experience you can have. It's only for artists that using it to draw and paint with. Nothing else. Everyone I know owning a Galaxy Note stopped using the “S-pen” already after a week o two. And no, using it for taking notes during meetings is not an excuse. It's both faster and more effective to type for real instead. Then you simply have a bad touch keyboard. I have done shortcuts on the iOS keyboard for taking notes during meetings that makes it so easy and fast.

Ugly & Unpractical: Samsung Galaxy Note 4 Gets Very Minimalistic Render, Some Specs

Concept Phones:

This is a 5.5 inch Super AMOLED phablet with a resolution of 2560 x 1440 pixels and a pixel density of 500+ ppi. Inside the Note 4 we find a Snapdragon 805 2.5 GHz processor and other specs include LTE Cat 6 Support and an S Pen stylus with updated gestures and air command. The device uses 3 GB of LPDDR3 RAM, it has dustproof and waterproof capabilities and runs Android 4.4.3 out of the box. There’s a 16 megapixel ISOCELL camera at the back with 4K video recording.

A quite ugly concept render of the Samsung Galaxy Note 4 if you ask me. And the buttons on the side seems to be made for one hand handling of the phablet, and I can't see that being practical at all on such a huge device. I also wish Samsung would be using such lock screen but they won't, I'm sure of that because TouchWiz will never be as minimalistic.

Samsung needs to do something about the ugly design of the Note series that's for sure, but this is not it.