Hardcoreware tested the streaming abilities of Windows 7
>> Windows 7 Streams Media to XBOX 360 and PS3 Seamlessly
Although both the XBOX 360 and Playstation 3 can support UPnP media streaming from Windows Vista, none of the video formats they use are natively supported by the OS. Streaming is difficult without the use of registry hacks, and it is undesireable to use transcoding programs like TVersity.
Since Windows 7 adds native support for these programs, we tested the streaming capabilities with both consoles. Will you be able to stream MP4 and MOV files straight "out of the box"? Read on to find out!
>> Windows 7 Streams Media to XBOX 360 and PS3 Seamlessly