How the Samsung Galaxy Note 4's S Pen will change your mobile life...

Mobile phones have made plenty of things redundant since their conception, with the likes of digital cameras, calculators and even torches hitting hard times thanks to our pocket based devices. But now, the good old fashioned pen and paper is being put in the firing line, as the Samsung Galaxy Note 4 is set to give us the most advanced S Pen stylus ever.

Exactly what has Samsung done to improve the S Pen?