The article specifically talks about the "global computing market" ... So it's referring to market share, not number of devices. Nothing misleading here.
Still, the article says "Microsoft is in danger of becoming a small player in today's global computing market". Which is not backed up by the data provided by the article. Unless we have the raw numbers, it could well be that Microsoft has been growing.
The fact that the total share of MS has been shrinking doesn't necessarily mean that MS is a small player in the global market.
"The fact that the total share of MS has been shrinking doesn't necessarily mean that MS is a small player in the global market."
That depends on the context. If you are trying to decide which OS to develop your software for, market share (with some adjustment for the willingness of users of a certain OS to actually pay money for software) is the critical factor. While Microsoft may still be large in terms of number of installations or dollars, losing on market share is significant. In the past, most software was developed for Windows first, and then OSX or Linux if the developer got around to it, which gave Windows a huge advantage in the market regardless of whether or not it was the best from a technological standpoint. Also, market share allowed Microsoft to essentially dictate "standards" (remember all of those websites that required ActiveX?). Microsoft may still be big and wealthy, but losing on market share really does change things -- it makes them "small" in a sense.
If you're a developer trying to decide which OS to develop your software on, and market share is a significant factor in your decision, you're going to choose something cross-platform. That's most likely web, but even if you choose one of the toolkits your choice is going to impact all of the OS producers equally: their marketshare will not be impacted at all by you, unless they actively inhibit cross-platform development on their OS. MS used to do that but not anymore; Apple tries to keep the wall around their garden but they don't block cross-platform completely.
While this is technically correct, what IS misleading is not incorporating significant changes to the market itself. The "market" in that chart starts off before the mobile revolution, and proceeds to include the mobile market as time progresses without properly depicting that significant and extremely relevant factor.
