What? A phone that also takes stills, video, plays music, does email, surfs the web, balances my checkbook, plays games, and is a full featured GPS navigator? That's crazy. Who would want such a thing?
Just kidding with you.
Like you, I will probably use the video feature of my D90 little. Perhaps we worried that compromises were made on the still image side capabilities to provide affordable video features. That is probably a groundless fear, even more so with the latest batch of DSLRs.
It would seem to be a logical confluence of related technologies. The quality of the video features are getting or will be getting to the point where few amateur videographers will need a dedicated video camera. Why carry two pieces of expensive gear when one will do both tasks?
Also, I think young people are much more into the video as a part of their "digital lifestlye" due to having the video features of mobile phones, iPods, and the like from a relatively early age. Those that gravitate towards serious photography will likely see the video features as desirable, even required to be considered.