TV is arguably still king of mass media. According to Nielsen the TV audience isn't eroding, although there's some evidence that cable audiences are shrinking and companies are losing subscribers. If it's not eroding, however, the TV (or video content) audience may well be fragmenting to some degree across multiple screens including mobile and connected devices like the iPad. 

TV remains a brand's best friend, for better or worse, and many CMOs are reluctant to pull money out of TV. However, Yahoo is making a bold push for a shift in marketing dollars from TV to mobile. To that end the company has introduced new mobile ad formats for mobile and the iPad:

• Yahoo! Mobile Screen Takeover ads are custom units designed with engagement in mind. The ad stays with users as they scroll up and down the page.
• Yahoo! Mobile Customized Expandable ads cover two-thirds of the screen, providing advertisers with the space to incorporate lead-capture tools, sophisticated graphics, social engagement features, polls and other options.
• iPad Tap to Video ads are banner ads that mobile users can tap to expand, unveiling a full canvas.

There's plenty of empirical evidence that mobile display and video ads perform better than their counterparts online. That's partly because of novelty but also because of share of voice and the nature of mobile media. It's not unreasonable to argue then in favor of a shift in ad dollars from TV to the iPad, for example. And mobile is really one of the only mediums that can effectively reach younger users. 

The following is a Harris Poll result that shows, among media types, where consumers say they ignore ads the most. TV is in the middle.