Although drones do use sensors, and thus are often mentioned as a growth driver for InvenSense, I don't see them as a big opportunity.  The one caveat to this opinion would be if InvenSense were to land some very high-margin specialized work. (military or similar)

Updates:
+1 Drones everywhere?09:25 21-Aug-15
?1 InvenSense and drones12:09 05-Feb-15