I agree that having a larger device means having better spaced keys, but as someone that went to the London hands-on event I did personally find it a tad difficult to comfortably press the middle keys of the keyboard. It's still doable, but people with smaller hands might want to take note.
In regards to the curved screen, I personally prefer a flat or close-to-flat screen for various reasons. That being said, given the size of the device I think the curved screen will be more comfortable day-to-day.
They did also discuss the possibility of a more compact version given success of this m