A wireless keyboard is not needed with a Smart TV.
Wi fi
The main advantage to wireless television is convenience. With wireless tv you can connect your tv to a cable or satellite without the annoying wires.
Usually you can't. Most TVs use propitiatory wireless adapters. They are more expensive too.
Yes, you can but your TV must have wireless functions.
To connect your desktop or laptop computer to your television you will use a vga cable. Information about how to connect the devices can be found at compnetworking.about.com/od/.../a/connect-pc-tv.htm .
TV has worked differently to the Internet. Either the instructions that came with the TV show you how to connect the TV to the Internet or sorry but
No, wireless connections can't provide enough power for a TV.
Yes. The WiFi capability of a TV enables it to connect to wireless hotspot. You will need to have a wireless modem established in your home, for the TV to use this facility.
Built in WiFi allows you to connect your TV directly to a wireless network. And if your wireless network is connected to the Internet, you can go to the Internet using your TV as the interface.
It means that your TV can connect to a wireless network. The fact that it has WiFi adapter means that you can browse internet or use apps like Netflix, Amazon prime in your TV without use of computer (depends on model).
Many of us have had the problem where we where limited to how we could arrange our house by the location of our cable out lets. With a wireless TV router we can move the TV where ever there is an electrical out let. The wireless TV router plugs into any cable outlet and transfers the cable signal wirelessly. Connect a wireless TV receiver to the TV and the receiver catches the wireless signals allowing you to watch cable with the outlet across the room.