Do any smartphone games use vector graphics?

As i understand it, most games if not all of them, use either raster graphics or 3D. Many of these have their assets made as vectors first and are then later exported as raster PNG:s.

The reason I'm asking is because i was playing two games that seem to utilize vector paths. Since Canvas do support basic draw functions, then maybe Construct 2 have some functionality that I'm not aware of? The games i was talking about are Fruit Ninja and Flight Control and how they both use some technique to trace graphics while swiping the screen:

<img src="http://i.imgur.com/oyJALFH.jpg" border="0" />

In the case of Fruit Ninja the swipe graphics look like raster but kinda "behave" like vector, so this got me a bit confused. Which is the common approach for creating graphics in smartphone and tablet games?

Thanks! ^^

The flight game looks like it's done in sprites, then uses sine based path.

as for Fruit Ninja. probably plotted points, then using smoothing techniques.

I can get this on my phone

play.google.com/store/apps/details