Like the article states: make a device that works the way I work.

I often use my phone outdoors. Make a screen that can be viewed in sunlight.
I sometimes use my phone in the rain. Make a device that is splash resistant.
My hands have not grown since 2005 but phones keep getting larger. Make a device that fits in my hand.
Even if it fits in my hand, I may occasionally drop it. Make a device that doesn't shatter when dropped.
When I travel or go hiking, I spend less time near outlets. Make a device with a swappable battery or one that lasts days.
When I travel, I use my phone for navigation and communication. Make a phone that works on any network.
I don't want to replace an $800 device every other year. Make a device that is affordable and lasts several years.

That's a good device. Many of these problems are ones that the device manufacturers introduced because they value form over function.