Beyond Consumption vs Creation
www.speirs.org/blog/2013/3/4/beyond-consumption-vs-creation.html
What Jamie wrote
This completely fits the bill for what device I reach for to get some stuff done.
I'd like to propose that we can look at the 'sweet spot' for each type of device along two axes: task complexity and task duration. Task duration is the more obvious of the two: how long of a continuous period will you be using your device for the task.