Beancounters at Gartner reckon that the social media sector is on track to make $10.3bn (£6.5bn) in 2011, a 41.4 per cent increase from 2010, and to keep climbing after that. Worldwide revenues for the sector are forecast to grow to $14.9bn (£9.5bn) next year and $29.1bn (£18.6bn) in 2015 as the advertising dosh for display …
Take this with the usual pinch of salt. People I talk to generally think that the social media hype has peaked and that companies are looking for other ways to "engage" customers. Anecdotal, small sample so not worth taking seriously unlike Gartner's extremely well-researched stuff, of course.
The Economist's Special Report on "post-PC" stuff is worth reading despite it being full of Gartner crystal-gazing.