Darren B is correct!
Our company looked into going to thin client computers, but they were all far more expensive than PCs. Most people in a company aren't traveling around everywhere. They must have surveyed sales companies or something. In manufacturing or most corporate offices, you can forget about replacing the PC anytime soon. They are just too cost-effective compared to other devices, and that's what the bottom line is all about. Plus, it's not like PC makers decided not to improve PCs a few years ago and retired. PCs keep improving, almost to the point now where they are over-powered and the software needs to catch up. Same reasoning with desktop phones. A majority of large companies may replace them, but most smaller companies are not going to bother with the switching over to VOIP or mobile. The cost is still too high.