The basic problem for PC manufacturers is that there is no reason to replacement. Most PCs will now happily run Microsoft Office and process video. What more do you need?

Microsoft’s (possible) response, 3D everywhere; 3D interfaces (think Kinect), 3D printing and 3D visualisations. There is a good article here,

• http://www.theregister.co.uk/2015/01/29/windows_10_heralds_the_minecraftisation_of_microsoft/