I have read your follow up interview on this subject and the shift in emphasis of an “office” environment from private offices to open, mobile team collaboration spaces, will bring greater need for UC-based multi-modal contacts and interactions. On the other hand, in such an “open” work environment, telephone calls and talking will be very disruptive and subject to greater privacy needs. This suggests that visual communication interfaces (i.e., email, IM, SMS, voice-to-text messaging, etc.) will further dominate traditional voice contacts.
This also confirms that the next-generation “office” environment will be be similar to that of the mobile user who must be able to communicate based upon both their availability/priorities, mullti-modal device accessibility, and their environmental circumstances. That individual flexibility is what UC is really all about!