http://www.pcadvisor.co.uk/news/index.cfm?newsid=105716&pn=3
SpursEngine is capable of encoding or decoding HD video thanks to hardware MPEG2 and H.264 codecs and can upscale standard-definition video to HD on the fly, without tying up the computer's microprocessor.
Thats something more than what the nVidia et al cards do currently correct? Sounds like a good direction for an HTPC video card to me