I produce historical documentaries, and this is my main computer for production. I need a laptop for the field to scan photos and record audio in realtime. I shoot standard DV for my projects, and I will use the laptop to edit the video. I use LiveType and Motion from time to time to “sweeten” my productions, but I wouldn’t categorize their use as a major part of what I do.
I also do web work on the laptop with Dreamweaver and the Adobe Creative Suite 3.