You'd prefer to watch videos on a smaller screen?

You'd prefer to listen to audio on tiny tinny speakers?

You'd prefer to type with two thumbs rather than 10 fingers?

You'd prefer to multitask on a screen that can only show one program?

You'd prefer to play games just two thumbs that cover the screen you're looking at?

You'd prefer to have an incosistent internet connection as opposed to ethernet?

You know none of those are true. Like it's been mentioned already the strengths lie in portability. GPS and Camera. Those things are inherently linked to being able to carry something small around. And even then for specific cases dedicated GPS devices and dedicated cameras are used.