There are around 1.6 to 1.7 billion* PCs in use today, and there are already perhaps 2 billion iOS and Android devices**. Over the next few years the great majority of the mobile base will convert to these devices: there will be 3 to 4 billion smartphones in use*** and hundreds of millions more tablets.
So, mobile means there will be two to three times more personal computing devices connected to the internet. But actually, that understates the change massively. The difference in how those smartphones are used is actually just as important as the raw numbers. MORE