You can call me whatever you want, seeing as how when I first joined the forums I was accused of being an NV fanboy, then an AMD fanboy, now an NV fanboy again apparently. Whatever, I think I am one of the more impartial and consistent people around here.
I don't think the HDMI thing is a big deal because who actually uses a GTX580 for HTPC usage, anyway? And if it's not going into an HTPC then you have other ways to get that audio.
The bigger issue imho is lack of single-GPU Surround. It was the biggest reason why I switched my order from a GTX460 to a HD6850 after my initial GTX4604-768MB order arrived defective (damaged PCB).
NV's Surround software also sucks compared to AMD's hotkey system where it's easy as pie to switch modes. This is a big deal to me because of all the switching I do:
a) single-monitor centered (side panels disabled)
b) tri-monitor Extended Desktop centered
c) tri-monitor Eyefinity
d) tri-monitor Eyefinity with bezel correction
I understand that there are a few hacks like Zotac's 460 that does triple-monitors up to 1600x1200 but that's just a hack. Hopefully Kepler will ship with full single-GPU Surround support, full HDMI 1.4 support, and Surround software with hotkey profiles.