I actually have various devices capable of streaming
bit of a collector.
WD Live streaming
Apple TV 2
Apple TV 3
As well as PS3 / Xbox 360 and Wii.
So if anyone has any questions please ask
Day to day, on the main TV, I am actually using the ATV2 most. Watching mkv and avi via Plex (yes it's jailbroken) and UK Netflix. I also have many films in Apple format.
The WD Live streaming is used only when I want to watch a 1080P mkv or a 3D mkv rip - also on main TV. I much prefer the APTV interface.
I only use the PS3 on this main TV when I want to watch Netflix US (via a dns service)
My Roku is connected to a TV in my office and is used to keep the kids quiet with uk Netflix and BBC iplayer. The 360 is also on this TV, but that is mainly used for Games by my sons.
The Wii is in the kids play room, with the older WD Live. These are used often by the kids for Netflix UK ( Wii) and playing local rips (WD) and a bit of streaming (WD has a usb wifi stick and can see the network shares)