They might as well call it 1000Gbs since powerline adapters barely are able to hit 20% of the rated speed with current 500Mbs units. Its a crap shoot whether or not your wiring is capable of handling even that.
I think it would be funny if NVidia announces Holodeck technology called G-Deck, but does not actually have such a thing and says its a proprietary solution. Just so AMD can come in and say, we have our own non-proprietary Holodeck technology.
Most of these powerline adapters are rated for far more than 500Mbps, but then use a 100mbps network port which destroys performance. As long as these offer a 1gbps port and your house is relatively new you should get near rated performance.