Explosive growth in take-up of smartphones and tablets means that the effective size of the internet will increase by several multiples within the next few years. This transformation in scale comes with a major change in character and operating dynamics, creating new opportunities and revenue streams.

Twitter is unique amongst social apps: it gives new users a blank canvas in which they can (and must) create their own social network reflecting their own interests, hence building an ‘Interest Graph’, but onboarding new users remains a challenge.

Revenue at Twitter is now on a $600 million annual run-rate, scaling rapidly since the introduction of ‘native ads’, and seems set for further growth: the key question is whether it can achieve breakout user growth and mass market scale.

Happy Birthday iTunes! It is just over a year since Apple launched iTunes and the media continues to talk up the second coming of the music industry, whose saviour appears in the form of affable Steve Jobs. iTunes sold a total of 70 million tracks online in its first year, well below its target of 100 million, but a respectable showing, especially since it spawned a small flock of competitors determined to out-sell iTunes.