[ViscountPenguin]

I'd expect the US to be the main topic on the English speaking internet far after its global dominance ends. I highly doubt that Canada or Australia (let alone the UK) are going to take English speaking dominance any time soon.

[dmix]

The Pax thing generally covers economic, military, and cultural dominance in a hegemonic way (the "peace" part is very relative, especially if you consider Britannica and Romana times). China might compete on some of those but still pretty far, they have little cultural export and lack global trade/influence. Europe is pretty far behind in everything but it'd be cool if they got their shit together.