Ethernet (or more generally wired networks) will NEVER go away in favor of wireless – there will always be both. Wireless is often more convenient than wired (but not always), however that convenience comes with several downsides as well. I am an electronics engineer, and I work with both wired and wireless networks, both at work and at home. Wired networks are more restrictive than wireless? Absolutely not! Other than the convenience of not having to run a cable, which is not a big problem for commercial users, wireless is more restrictive than wired in every other way.