That's what I started using last week, and once I got past the initial setup woes, it's been pretty smooth so far. I've never been very big on cable, but you should see me setting up all my recordings now! I need to see if they let you use WMP as an extender, which means I could view the content on my main desktop too!
If your main desktop is Win7, just make sure your HTPC and desktop are members of the same homegroup. They should share libraries at that point. (Or just share the directories and add them to your desktop's media libraries.)
I watch all my stuff around assorted computers in my house.
I hate my Comcast DVR, so bought a SiliconDust HomeRun Prime. So far, it's been really nice. I just got done ripping about 20 movies from DVD and adding them to WMC. The WAF is growing.
My daughter has now turned 5 and I trust she won't destroy a nice TV, so I am FINALLY getting a HDTV. I am going to heavily try to get my wife to use WMC as the default viewing experience. I'd love to toss the Comcast DVR back to them.
Edit:
Remote Potato will certainly do the trick, but adding the libraries manually, or through the homegroup, will keep you in the WMC interface, and then you can keep the goodness of commerical skipping and a cheap WMC remote.
