Over the last couple of days the news has been full of stories recounting how online advertising spend, in the UK, has surpassed spending on TV advertising, for the first time. The lazy assumption, and one that has been made repeatedly over the last two days, is that means online advertising is replacing TV advertising.
A much more considered view is shown by Nigel Hollis in his blog. Nigel patiently points out that large parts of online advertising are not comparable to TV advertising, for example a large part of it relates to search engines. In many ways the story is not about online vs TV, but the way that online is replacing print, outdoor etc.