It’s not as if */Linux dominated everything in every way. */Linux did dominate everything but the desktop in every way. The big thing that happened in 2013 is that */Linux took huge share of retail shelf-space at last and has begun to eat up the web stats.
For the greater certainty about what’s happened, if you extrapolate that least-squares fit to the data, expect a “singularity” in about six months, mid-summer. The growth of the webstats for Android/Linux will be far exceeding what M$ has seen lately, even with a monopoly on retail shelves. We are in a “positive feedback” zone where demand will grow possible exceeding supply. Essentially, the monopoly that once existed will have disappeared even in the statistics of M$’s “partners”. It’s long gone in the statistics for shipments/sales in 2013. The data is just taking some time to catch up.
Further, the share of GNU/Linux, while not as spectacular, continues to grow even as shipments of legacy PCs slump… GNU/Linux is beginning to be found on some retail shelves. While the stats globally are ~1%, there are many countries (Uruguay, Paraguay, Venezuela, Germany, Spain, …) where GNU/Linux is many times that level. Soon, other countries will follow their lead. It’s all good. I expect 2014 will have Wintel in free-fall with no good soft landing. */Linux has lots of upside. If there was any doubt left in 2013, it should be gone in 2014. We should see Chromebooks accepted globally then. So far, Chromebooks have done well in targeted markets like USA. There’s no reason they should not succeed in the rest of the world and GNU/Linux will also work for those who want thicker clients.