That is a nice thought isn't it. Also to move all my physical media into 1 place. Its nice to have.
The pc cable cards were alittle pricy, but ceton dropped the price of their 4 tuner card to ~300. There was also an external type tuner in development by someone else, but I have not seen it yet. I will be adding a tuner to my HTPC at some point and then probably just use xbox360 as a media extender on my other TV. I am also waiting on reviews of visio tablet as a all in 1 remote control

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The most annoying thing is that there are not good/enough 64 bit codecs. If you planned on just using 64 bit WMC, you need to do a few workarounds. I use XBMC since I do not have TV tuner yet. Even with a few minor annoyances, it is so nice to have a HTPC with all my music in flac and all my movies at a wave of a mouse

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3500+ solo kills & Lone Enforcer
WAR - IronRock Dest- Energist, Moogabooga
SWTOR - KV - Energist, Moogabooga