You're right when you say Netflix Canada offers very little in comparsion to Netflix US; but Google TV does not require any accounts that are only available to US customers. That is also wrong. You just need ANY google account. You can make one when you purchase the device.
Ok, they either changed the rules or I misread them.
But it's why an opensource solution is the only thing that would work. Netflix aren't going to have good Youtube support and Amazon aren't going to do a good job of Netflix, neither will do the BBC. And when some online service marginally changes its system - a cheap HW maker like Logitech isn't going to put effort into an update.
But having seen what Netflix Canada offers I'm not too bothered!