The Missed Opportunity of Linux?

Is it possible that Linux missed a huge opportunity to completely take over an operating system market? OSNews discusses the possibility that this might have happened around 2001 when the first smartphones appeared in the market. Since then, Symbian is thriving, Windows is slowly taking them over and PalmOS is fighting an uphill battle. And Linux has barely 1% of that market even if it's more capable than any of these embedded OSes.