Linux owns everything else, but Microsoft still own the corporate - and home - desktop. Devs using Linux or Mac are not the majority of users.
MS is still corporate-centric in the US, and popular in foreign countries where Apple stores don't exist in large numbers.
In the US, perhaps. Where I study, I can count the number of people owning MacBooks on my fingers. They're still way too overpriced/lacking in hardware compared to PCs at the same market rates.