The killer use case of this would be for people like myself in places like Australia, if I wanted to make my entire network pretend that I was in the US as far

The killer use case of this would be for people like myself in places like Australia, if I wanted to make my entire network pretend that I was in the US as far as Netflix and only Netflix is concerned. That way, my PC, TV, media centre, iPad, etc. would all transparently have Netflix work yet not end up routing all of my other traffic through the US. My family could then 'just use' Netflix on their various devices without me having to turn it on at the same time as I play a game without my ping being sent through the roof routing to the US and back. PS: any Aussies out there, I am not telling you to do this. We're not allowed to use Netflix according to the ToS/EULA. Edit: that is to say, Netflix is one of many. See also BBC iPlayer, Apple radio, etc. etc.