Kinggo, for me it the size of the device not so much the size of the screen.

I would love a full screen device. But I like the size of say the iPhone 6/7 as a good size for the pocket and ease of carrying. I cam to the realization that many ppl carry around their phone not for the addiction of content ... but also because they just don't fit in pockets the way they used to.

So keyboard as big as possible, screen as big as possible ... but device as small as possible

x