"Linux of Clouds" would do well to observe Linux's history
(historical points may be a little fuzzy here, but bear with me)
Linux started as a copy of an incumbent (Minix), and matured in its own direction. At this point it was really a glorified toy. Some people used Linux for real work, but it was relatively rare (I'm thinking of those few people who knew Linux 1.X). At this point, the Linux pitch was "Tickle my belly, I'm soft and cute".
During Linux 2.2, or thereabouts, Samba reached maturity, and the dotcom boom was in full swing thanks to Apache ("httpd", for the kids). There was a tremendous kerfuffle when Samba on Linux was benchmarked as faster than an NT4 file server; and Linuxcare sucked up a lot of money and people, and pushed out a lot of advertising. I think this is when Linux got very, very real. At this point, the Linux pitch was "I'm like you, but better".
Into Linux 3.x, we're almost into a post-Linux era. Linux has grown and matured to the point where it's really part of the IT furniture. Linux continues to get crazy new features (ceph!); but for now the Linux pitch is "I'm Linux".
OpenStack will need to forge its own path, and remain relevant to AWS, until the outcome is known. MS knows this, and demonstrates it with Azure. You can't be (and remain) a better AWS than AWS - the real game is to be the better cloud infrastructure.