Goes without saying that your computer would require a good enough ethernet port if you'd like to take advantage of the 1000mbps.
Same with your wireless card and your powerline adapter.
The speed is as good as your slowest component involved in carrying over the network.
Also, wifi and powerline would take a hit as it's not direct. I have no data to provide about either as all my wireless cards cap at 300 or so, and my powerline caps at 50.
Direct connection to the router via ethernet ftw.