The customer-facing front page of Ubuntu suggests that change is in the air. Boldly displaying a Lenovo laptop happily running Ubuntu 12.10 – browsing the internet in Mozilla Firefox, no less – Ubuntu seems to be pushing the idea that it’s ready for the big time. Beneath the proud banner lie adverts for businesses to adopt OpenStack, and a tiny note that 20 million – yes, 20 million – people use Ubuntu in the place of commercial alternatives. Ubuntu has never been so bold to suggest it could – and should – displace more mainstream operating systems. Does it have any right to that?