Rumors are starting to circulate that the new Galaxy S4 (S IV, S IIII, whatever), which may debute as early as this months Mobile World Congress, may feature the first production model 8 core processor!
According to some rumors, Samsung has expanded on the companion core technology already in use in Nvidia's Tegra series (Quad+1) by sandwiching four ARM A7 processors to four ARM A15 chips. The idea is that the A7s do all the boring everyday task that don't and shouldn't use much battery power, while the A15s handle the computational heavy lifting.
If this pans out to be true, Samsung will have a major jump on it's competitors when the S4 hits stores (not that Samsung needs it, they already dominate the Android phone market).
One glitch in this rumor so far is that Samsung isn't really expected to reveil the new S4 at the Mobile World Congress since they are planning a seperate event for the official product launch (like they did last year with the S3).