What more could browser makers have done to encourage RSS? Technophiles love it, but the mass market rejected it.
For all intents and purposes, Twitter is a simpler, more intuitive form of RSS for the layperson.
As long as tools like Google Reader exist for those of us who do use RSS, I'm not worried. And if Google kills Reader, it will probably usher in a new renaissance of feed readers that are currently non-existent because of Google's ads-funded largesse.
RSS is now too important to too many people to just die.