I think a barrier at least equally as large in some places will be that it's only really on flagships - if it needs to be used by the masses getting it into eve

I think a barrier at least equally as large in some places will be that it's only really on flagships - if it needs to be used by the masses getting it into every Android smartphone instead of a select few would be a huge step forward. In many places that would probably be more significant than Apple implementing it (although not North America, which is at a guess disproportionately significant for development effort etc)