"Wi-Fi Ready" means that the player manufacturer also makes a Wi-Fi adapter (sold separately) that can be plugged into the player's USB port. Only their adapter will work with the player, so you can't shop around for a cheaper adapter from another manufacturer that would also work with that player's USB port.
"Built-in Wi-Fi" means that the wireless adapter is already an internal component of the player, so you do not need to buy a Wi-Fi adapter for the player.
All Blu-ray Players that offer network streaming services will have an ethernet port that supports a wired connection, that is a standard component for those players. So if you wanted to save money you could buy a player without built-in Wi-Fi and then connect an ethernet cable from the ethernet port of the player to your router. It may not be as convenient to run an ethernet cable to your router, but it is cheaper option and a more stable connection than wireless.
You could also connect that type of player to another kind of wireless network adapter using an ethernet cable. Those adapters are not the small USB sized adapters sold for Wi-Fi ready players. They are sometimes called wireless gaming adapters, and can act as a bridge between any wired network devices and your wireless network
They mean the same that if you have a WiFi connection the devices are ready to b receive the signal
there is no difference
SMARTNESS
Nothing
Yes, Dsi has built in wifi. You need to configure it to your existing modem.
the first has wifi and the second does not.
The most basic difference between broadband and wifi is that the broadband must be connected while wifi is wireless. Some broadbands could be wireless as well but they most then be connected by a router.
Yes, this Gateway P-7807u 17" Notebook PC has a built in wifi receiver.
Mifi is portable wifi
Yes the ps3 has wifi built in.
Yes, it's built in and works similarly to the wifi on the iPod Touch.
Yes! Both 120gb & 250gb have built in WIFI
The newest 360's come with built-in wifi as standard.
Yes, they have wifi and also are fully Bluetooth ready.
Yes. Every iPod touch has built in WiFi.
Only the Xbox 360 S has built-in wifi.