Rumor: Samsung GALAXY S IV to Come with S Pen Functionality

Will the Samsung GALAXY S IV incorporate the S Pen functionality that is a signature feature of the GALAXY Note series of devices?

With the GALAXY S III sharing several similar software features (1) (2) as the GALAXY Note II in its latest Premium Suite updates, is it possible that the former will inherit the S Pen functionality from its larger sibling in the near future? Well, it may soon be a reality.

According to Korean sources, the GALAXY S IV will be the first of its series to come with the S Pen, which is a stylus concept first started in the 5.3-inch GALAXY Note. The information is apparently confirmed by a quote from a Samsung official. 

In addition, the same sources also asserted that Samsung will launch the GALAXY S IV in April 2013, a time frame which was earlier reported by an inside source of SamMobile. The GALAXY S IV is said to sport a slightly thicker chassis (9.2mm), which seems logical considering that it will house the S Pen. Specs provided are in line with what we've heard so far, which include: 

• 5-inch 1080p display
• Samsung Exynos 5540 quad-core processor or ARM's big.LITTLE architecture (pairing of a Cortex A15 processor as the "big" CPU and a Cortex A7 processor as the "LITTLE" CPU)
• 13-megapixel rear camera 
• Jelly Bean

Both the GALAXY S III and GALAXY Note II have turned out to be the hot favorites among consumers (1) (2) this year. Would the overlapping of hardware and software features between the two series lead to market cannibalization?