>> becoming mainstream i.e. reach at least 5% usage share Prove that it hasn't. When I bought this machine I booted Windows 8 because I'd read that I had to do

>> becoming mainstream i.e. reach at least 5% usage share Prove that it hasn't. When I bought this machine I booted Windows 8 because I'd read that I had to do some stuff to fix it so I could install Ubuntu, it didn't work so I booted an Ubuntu LiveCD and wiped the disks then installed Ubuntu. The point being that somewhere Microsoft now may count this machine as a bought license even though I don't run Windows 8 on it. There are probably many machines out there like mine.