Uhh, I don't think that's true. It may be the only sound card that can stream TrueHD/DTS, but hell the software video card codecs can happily output uncompressed (bitstream) 7.1 audio, since that's the format it comes in as anyways. I believe all of the BD players for windows decode TrueHD and output it bitstream as well, similar to what the PS3 does. Certainly on my receiver it reacts similarly with the PS3 vs. my HTPC (ATI HDMI out) outputting raw 5.1/7.1 bitstream audio.A big chunk of that $500 comes from the soundcard alone (the ASUS HDAV1.3) which is the only soundcard capable of bitstreaming or decoding TrueHD/DTS HD MA.
Anyways this is getting a bit off-topic. Personally I was impressed to see CryENGINE 3 do as well as it does on current generation consoles (I saw the demos at GDC), and am looking forward to what those guys will continue to do with it, both in the console space and on PC. I suspect that due to their console porting efforts it'll run quite well on current PCs, with higher resolutions and AA/AF to boot.