In five years, will tablets and smartphones surpass PCs in e-commerce sales?

There is no question that the sale of smartphones and tablets are on the rise, and continue to surge. The question is, how long until they totally eclipse the PC market? You rarely hear about a consumer itching to buy a new PC, but you commonly hear this regarding the iPad ir iPhone. These new technologies are trending, and are much easier to use and transport than their elder counterpart. 

I believe that there still will be a large market for PC's though, due to the fact that businesses and education facilities will still be desiring stationary modes to access the internet. PC's are much better suited for this type of work, most importantly because they are capable of retaining more information, and do not need to be portable. Personal sales of PC's will take the biggest hit. Personal usage of internet is more catered towards portability and  easy access, which is provided with tablets and smartphones.

If you think back 10 years, laptops were just being integrated into society and cell phones were very simplistic. In the past 10 years we have developed both into highly intelligent information systems that are capable of doing just about anything we desire. What will our technology look like 10 years from now? There is no way of predicting where technology will take us, but if we look back on how far we have come, there doesn't seem to be any imitations.

How long do you think it will be until PC's are totally extinct?