Apple Inc. (NASDAQ:AAPL): Current price $503.45
Apple and Google have long dominated the smartphone market. Now, a new giant, Tizen, is rising to challenge their dominance. The Linux-based operating system is gaining steam faster than expected, with Samsung confirming that they will launch a number of Tizen-based devices this year. This suggests that it has the potential to make a major dent in the current market leaders’ share.