I'd consider windows 10 evidence that proves convergence is a bad idea. It does an absolutely terrible job of being a tablet and a desktop OS. At times it feels like two OS's in one and at other times it feels like you're stuck in the wrong mode (and after a reboot you are).

Half the apps (explorer and vlc are the two I used the most) work horribly in touch mode and the other half work horribly in desktop mode, like the way the pdf reader default to full screen.