At the very end of the Q&A someone asked if Nokia is planning on releasing a "QWERTY" phone (I think he meant a phone with a keyboard). The answer was no -- that trends are for touch screen only.
If Microsoft are truely going after business clients, then a physical keyboard would be a very good thing to offer on at least one phone.
It does supprise me that with all the various combinations of features, Nokia havn't tried to produce a keyboard phone. Maybe WP8 doesn't support it.