One, the ability for me to designate which applications I want to run as background tasks.

ENGADGET: Entelligence: Mobile multitasking is mostly a myth

Likewise, the first software I download for any Android device is a task manager to kill background tasks and apps The reason is simple.

ENGADGET: Entelligence: Mobile multitasking is mostly a myth

For all the talk of wanting improved battery life, the limits of technology (and mangling background tasks in the Operating System) mean it is unlikely that current battery technology or programming techniques will lead to any significant increase in battery life in the current physical space given over to the battery.

FORBES: You Can Have It Thin Or You Can Have Battery Life In Your iPad Mini...Not Both