We haven't even begun to see the power of RSS feeds. The searching, sorting, re-using, and general acceptance of feeds are still in their infancy.
Remember when it required serious 'net savvy to find stuff on the WWW? Google (and other services to a lesser degree) changed that. Expect to see similar advances in the way we use RSS feeds. Web browsers (d)evolved to the point they are intuitive for the most computer illiterate user. The same will happen in feed reading, because the masses don't want to think about the technology. It should happen naturally, obviously, and intuitively. It shouldn't require hours of search, cut, paste, and re-type to find and download podcasts on a particular topic, for example. It's bound to happen, and reassuring to think it won't be Microsoft or Apple that makes this a user-centric technology. The Google Reader and iGoogle are making headway fast.