Mhm... From what I see here, it's Android and iOS that have to catch up. Symbian is still ahead.
The problem with Symbian is that it was were it is now in 2007 and never moved an inch since then, while all the other competitors moved closer. Android seems to be almost there, iOS might never be as Apple doesn't target that particular market. Still, it's evolving.
The point is that yes, you could go further with Symbian if you'd bet on its strengths, not change direction and try to go the other route.