shekhar.royal:if sony is going to give a 3d firmware upgrade to existing PS3, then should there be really any problem ? Because HDMI 1.3a already exists and there is no way to change it...then I feel there will be no problem for the exisitng Denon 1910 to pass the audio....right?
The issue here isn't whether the Denon can deal with HD audio over HDMI (we know it can) - the issue is that it won't be able to pass through a 3D signal to your 3D-Ready TV.
So how to get a 3D picture AND HD audio together becomes more complicated - as I've said, unless the player has two HDMI outs, one for video and one for audio (which the PS3 doesn't), or multichannel analogue outputs (again, nada) then you're left with optical digital for lossy audio.
The 3D firmware upgrade for PS3 only means that the unit itself will be able to deal with 3D. It's the Denon which is incompatible with 3D, and is unable, unfortunately, to be updated via firmware.