Only in the US and global high-end market. This is an extremely profitable market to be leading and I'm not trying to minimize Apple's achievement, but globally relatively few people use their phones and tablets, and ever fewer use their traditional computers.

Apple has a sizable lead, but I think the "idea" of what a smartphone is has been locked in essentially in the mind of consumers and their technological lead will only last so long as time passes. They are Microsoft but of smartphones and 20 years younger than windows desktop PCs. They know this, which is why they constantly make new things and try to develop new products (vr headsets, etc).