I hope I'm wrong, but I don't think we'll ever see a card that can capture and encode a HD signal from component inputs...
(something that would be needed to get HD from an STB for satellite subscribers to HDTV broadcasts)
but perhaps we will see a capture card with DVI or HDMI inputs?
I suspect we'll eventually see component high def capture, but no DVI/HDMI capture, since it has some sticky legal issues.
Component hi-def would take some powerhouse of an onboard encoder! But I hope you're right sub
and yeah, I guess HDCP and all that mess spoils the fun for HDMI capture.