Reading your other comments I see where you're getting from. And if you're indeed adding phones and tables Apple and MS are both at a ~20% (android has an overwhelming +50% by the way) from the same sources I looked at before.

If you just look at "desktop/laptop" Windows still reigns supreme.

Now the question is could be: should you include those for this discussion or not?

Yes because lots of people use them. No because the conversation was about laptops.

regardless, I now understand your point