How about ads on a tablet device? Ads could help lower the cost of the mythical tablet, especially when those ads are sold by, say, content creators like a newspaper or four. I realize those are a lot of threads to pull together, but all the speculation seems to be swirling around this tablet, the cost and the content that'll go inside. Traditionally cost has been the Achilles' heel for an Apple product, but with ad-supported price breaks you could theoretically lower the cost of the product to the consumer while keeping some margins.
Then again, Apple may simply be planning to integrate Quattro into the developers' toolkits, and provide them with an in-house solution for ad-supported apps. Or maybe they are going to sell an ad-supported OS X for Dell machines. Who knows? As I write this neither company had any comment on the sale or announcement.
UPDATE: Yeah, Apple bought Quattro after all. Let the advertising begin!