The HDMI chip on the PS3 cannot send bitstream of TrueHD and DTS-HD/MA.
The PCH can pass through : DTS, AC3, DTS-HD MA, DTS-HD HR, Dolby True HD, Dolby Digital Plus.
Only matters if you get a receiver that can also process those streams, but if you have a nice system
in place it makes a big difference in sound.
Also PCH handle pretty much any type of video u can put on a hard drive.
Only gripe I have with this player is the nic card on it. 10/100
I guess if streams a HD file ok then it doesn't matter.