Something about going with a 3.1 inch display is just so small. I mean I understand 3.5 or even 4 inch but 3.1. I am a bit impressed with the Z10 but its still not as impressive as some of the newer phones Windows and Android are pumping out.
A 4 inch screen coupled with a physical QWERTY type keyboard would be approaching phablet territory in terms of size. Those that want actual keyboards know the tradeoffs. The whole point of getting the Q10 would be the keyboard and the advantages it gives those particular people.