Back in 2007 before the iPhone was released 90 percent of the systems that connected to the web were Windows PCs. In less than 5 years this has changed to the point that:
In 2012, Gartner projects that worldwide PC sales will reach about 400 million units in 2012, while smartphones will surpass 600 million units. Tablets will sell about 100 million units. That means that only about 35% of the new devices sold this year that will be connecting to the web will be Windows PCs.
The future of the PC is in question:
By 2015, Gartner projects PC sales will grow to over 500 million, but tablets will triple to about 300 million and smartphones will leap past 1.1 billion.
It is obvious that everyone now, and in even more so in the future, will have to develop their web sites and resources for a mobile platform. This will require a rethinking of web sites, customer services, location services and much more. It appears that only the growing pace of change is the constant for the conceivable future.