I've been in the journalism/PR/digital marketing business for 18 years (in that order). If you've ever worked at an agency, you know that the lines between PR, advertising and marketing has become blurred because of online communications, i.e. social media.
The space is become very crowded. Guru's are a plenty. Books are being written at a feverish pace; books on Google+, Facebook, social media in general, location-based stuff, etc.
It's never ending and to be brutally honest, it's tiring.
Here's what I'd like to see from PR, advertising and marketers in 2012: