If you have been following this space, here is a conclusion that's not going to surprise you: Online advertising will grow, but it will do so more slowly over the next few years.
That's the headline on a handy chart sent over by eMarketer this morning. EMarketer is a quantitative accumulation of the conventional wisdom, pulling together forecasts from various research firms.
Next year online ad spending will increase by 29 percent, it predicts. By 2011, the company predicts, $42 billion will be spent in advertising online. That will only be a 12 percent increase from 2010.
It does predict advertising on web video and mobile telephones to triple in the same time scale, with social networks getting only 6% of the advertisng cake.