While online video creates new ways in which to acquire and disseminate information, it does not appear to be replacing traditional media outlets. Eighty percent of consumers say that online video usage does not cut into their TV time.
However, differences by gender and streaming usage are apparent. For men, online video usage cuts into TV time significantly more than for women (29 percent and 16 percent,respectively). While 29 percent of heavy users of online content (those who view content more than once a week) claim that video usage cuts into their TV time; only 12 percent of those who view content once a month make that claim. Of the 51 percent of respondents who indicated that they would watch a television episode online after missing it on TV, heavy users are the most likely to do so – comprising 62 percent of that population.
Consumers like watching TV online for the convenience factor, but connectivity and small screen size are still a barrier. Consumer comments include: “It’s just as enjoyable as watching on television, plus you can watch when it’s convenient for you;” “I like that it is available at my convenience to watch the show. I dislike that even with DSL the quality isn’t as good as watching it on cable;” and “It usually takes some time to download it, and my screen is smaller than the TV screen.”
References: http://www.advertising.com
IT - Telecom Business 
No its just a transformation in our outlook towards advertisement. Online ads are bound to rule the ad world in the coming years.But the challenge is “attention span”.