Steve posted in his Facebook profile work info about the hiring. He also clarified that his involvement in the CyanongenMod will continue even though he will work for Samsung. The success of CyanogenMod up to this day is because of the developers behind the great firmware.
Many speculated that Samsung might use CyanogenMod in their upcoming Samsung Android phones or somehow he will influence how Samsung use Android in their devices.
I hope this is not the beginning of end for CyanogenMod firmware or if his work will affect the future of CM. CM is a great firmware and it is already tested and proven.