The web is always been poised to grow. (Duh.) And as a second order effect the amount of information available through feeds seems likely to overwhelm the casual onlooker despite its being potentially useful for them. A (currently) smallish cross-vendor community has been adept at making tools for managing this incredible volume of data available for everyone for years and at Google we're interested in helping out with the resources available to us.
More later. There's a little bit of digital soup being thrown at the newborn. So many people... so many people at the same time...