The death of music reviewing - the Twitterverse is to blame

THIS latcheco seems to think that Twitter is going to kill off music journalism and that everyone is looking to this latest social networking site du jour and blogs for new music.
Perhaps he hasn't studied the business model of most social networking - what is going to keep it online 10 years from now? Where's the revenue stream?
Maybe everyone is a journalist now - actually no they are not. Just being able to write a review doesn't make you a music journalist - it just makes you opinionated, at best, and linked to the artist at worst.
If Paul Du Noyer or Dave Hepworth or Andy Gill or Pete Paphides or Caitlin Moran or Dave Fanning or Peter Guy (well maybe not him) say a record is good I may Spotify it (to coin yet another digital age verb) and then buy it. But I will never buy something thanks to a Twitter feed, which is prone to huge manipulation of the music companies anyway.
See what you think.