I guess you are right: the Magic word is PRODUCTIVITY.

The N900 so far is the only mobile phone I can use to produce something. Therefore I am still using it - together with the Jolla. The N9 is much more elegant than both, the N900 and the Jolla. But the N9 is so limited ...

It is the Keyboard, of course, and the precise stylus, that help to be productive on such a small screen. And than it is Easy Debian.

Plus, even the email on the N900 is more productive because you can easily manage replies to a number of different addressees including citations from other mails (thanks to copy and paste) and attachments of all kinds (but word documents :-( )

There still is nothing like this available, as far as I can see