Phablet users spend the most time in-app
Over the past decade, mobile devices have been getting smaller in every dimension (no #Bendgate jokes here...) Unfortunately, we also want to get more done on the move at the same time. As capabilities have increased, due to faster mobile networks and hardware innovations, the potential to do more is there - but it often requires a bigger screen.
The extra real estate allows for more immersive content, and more detailed information.
Even Apple, who was once adamant against larger screens, has seen the light...