New Advertising Revolution is On Demand?

According to National Journal's Hotline, Comcast On Demand may be leading the way toward a new advertising revolution:

"Comcast is selling On Demand political advertising as an environment for candidates or advocacy groups to "elaborate on their causes." Since DVR advertising is not bound by the same constraints as television or radio, it allows campaigns to run spots of up to 60 minutes and gives viewers the freedom to decide which messages they are interested in watching.

(...)

"Dem strategist Joe Trippi notes that this technology could prove beneficial in targeting voters, and is certainly "something campaigns should take a look at." Particularly on the Congressional level where resources tend to be more limited, this could become a significant medium to access specific voters. Due to the capabilities of DVRs to track personal habits and information, a new means of targeting becomes
available.

(...)

"As Trippi notes, many political firms are still traditionally buying the four major networks. "It will take a major win from a pioneer campaign" for this to gain recognition, similar to the way the Howard Dean campaign launched the internet revolution."