Blu-ray discs were created to stand out from DVD by having an Internet connection that could let them access new content. This of course required that the Blu-ray player had an Ethernet connector, and many of the first generation players did not. But with third and even fourth generation Blu-ray players now out, it's expected that you will be able to connect the Blu-ray player to your broadband network.But...
The "but" is that many don't bother connecting the Blu-ray player because of all the wiring and work necessary to hook it up. Not to mention the pain it would be if you wanted to take the Blu-ray player from one room to another. This is a shame because the actual connection that must be done is no longer complicated, involving only a few presses of a button on the remote. Still, the "physical" work has been daunting or just too much trouble. The solution? Make the Internet connection on the Blu-ray player wireless so that it can connect to a wireless network like it was a computer or a laptop or an iPhone, etc.
Of course for this to happen, the Blu-ray player has to have the ability to connect wirelessly built into its technology. And it would be better if you didn't have to use some external antenna attached to it, as that adds another layer of possible problems.
Which is why Sony's BDP-S560 is so outstanding - it has the wireless connection built-in.