But there is no point in investing very much in a stagnate mature market to either maintain or disrupt it. So technology action will move elsewhere, like phone (which is almost mature, or cloud, which is still kind of young). Chromebooks were a pretty gutsy move by Google in this regard, but it was really just a services play for them.

People would often mis-understand post PC to mean "death of the PC" but really, it just meant "death of the interesting PC market where new money could be made."