It may be too early for this, but if we see em' we report em'. Supposedly, according to the KoreaTimes, Samsung is already planning to unveil the Samsung Galaxy S IV at Mobile World Congress in February 2013. Additionally, the scuttlebutt is that they will launch the device, shortly thereafter in March. Additional details suggest that the phone will be packing an enhanced quad-core Exynos, LTE, and a 5-inch display. According to the report, the SGS4 may not have Samsung's newest flexible display tech as they are still working out the bugs. The unnamed official from Samsung also had this to say,

“Samsung wants to keep its one-year product schedule and the Galaxy S4 will be the first to match that strategy. The S4 will see some external changes but retain its popular rectangular shape with rounded corner concept.”
Well... excitement over the SGS3 still hasn't waned yet, but how many of you guys will be due for an upgrade in March of next year?

Source: S3Forums