I've personally heard Eric Schmidt say that mobile is the future of of Google (and this was several years back--they saw it all coming). Mobile phones will provide more people access to the Internet than PCs in the very near future. The phones are already there, it's just your definition of Internet access as many are very low-tech devices that can only use SMS to get mobile data.

Desktop computers will remain popular for work in information based economies like ours, but there are billions of people out there who will access the Internet soley from mobile devices.

(I'm currently sitting in front of my computer but am writing this on a mobile device.)