I could argue your math or the fact you are only looking at this moment right now, after Windows 7 has been on the market for almost 3 years and is in its decline. Or I could just post an article explaining my point...http://gizmodo.com/5878036/microsoft-sells-more-windows-7-than-every-mac-ios-and-android-device-combined
I am fully aware of the post PC era and the cash grab behind it btw. I spent most of this week working on monetizing video ads on an iOS app. And guess which OS I had to use to do this...
I did not look at WIndows 7 as of right now, I looked at lifetime sales of the product. This seemed to be the best measure because the PC market isn't growing and I don't have good information on the sales curve of Windows 7. Thanks for the new information.. The number I used before was earlier and not part of an earnings release, so average sales per day of Windows is actually more like 640,000.
I did look at recent sales of iOS and Android because those platforms are growing rapidly, between 50% and 100% per year. Looking at iOS starting from fall 2009 as your linked factoid does is misleading because it discounts these enormous growth rates by averaging out todays iOS and Android markets with a time when Android activations were one tenth the current rate.
That's like comparing cumulative game console sales from all generations between Nintendo, Sony and Microsoft and concluding that the Xbox really isn't very important while the Playstation is killing it. You're letting historical patterns interfere with your view of the current landscape.
Windows may be a killer brand in desktop computing, but after several expensive attempts has utterly failed to make a lasting impression on mobile computing. Xbox, on the other hand, after a couple expensive attempts, has established itself as a fairly strong brand in its market. There's a lesson here.
"The worst part about these reviews is they are [subjective]--and their scores often depend on how drunk you got the media at a Street Fighter event." — Mona Hamilton, Capcom Senior VP of Marketing
*Image indefinitely borrowed from BrainBoxLtd without his consent.