When MS announced that they were bringing DCTs to MediaCenter I was really excited; but of course that didn't work out. Instead of being something that added value to the platform, it turned the PC in a closed box solution. Since the recent CableCard announcement at CEDIA where everyone concerned seems to have come to their senses on DRM and the OEM requirements. With everything that I found objectionable no longer blocking, I have to admit that I'm tempted.
I'll have to see where Ceton's tuner is priced and how Comcast flags non-premium content, but even then I'm not sure I could give up all the good stuff that Sage provides. Fortunetly I don't think that will be required; got something working back at the lab that makes Media Center into a SageTV Network Encoder :)