802.11n or Powerline Ethernet Adaptor

I note that powerline ethernet adpators which some body call them as homeplug can now support 500 Mbps and 1000 Mbps.  This is much better than 802.11n WiFi connection. The best I can get from 802.11n at home is always below 30 Mbps though the specification states the client can have a maximum speed of 300 Mbps.  If the throughput of ethernet adpators is reduced to half due to cable length or noise, the offered speed of 250 Mbps - 500 Mbps is still far superior than the best WiFi devices. It is now the right time to consider replacing 802.11n by powerline ethernet.