It's bigger and heavier than a phone.

It has a smaller display with a crease[1] and has less battery than a tablet. The screen is even smaller than an iPad mini. IMO that form factor only really works for like a Kindle.

And the screen has a matte finish which is only going to reduce contrast.

[1] https://www.reddit.com/r/pics/comments/1wbx1wo/there_is_a_cr...