So far, only Cablevision and Google Fiber have been announced in the US. International streams are compatible already.
After releasing a new tier of HD that many found disappointing, the folks at Netflix are stepping things up. They've equipped themselves with something they're calling Super HD, which will take more bandwidth, but promises a smoother and clearer picture than the current HD streaming.
Super HD streaming is only available on a few ISPs – currently only Cablevision and Google Fiber. It's also limited to a few devices including game consoles, Apple TV, Roku and Blu-ray players and Smart TVs that are already able to do Netflix in HD. PC users are out of luck unless they're sporting Windows 8, which is compatible.
Netflix doesn't have quite as much info out about 3D programming, but they're putting that into place too. Just like with Super HD, you'll be limited if you're not on specific internet providers.