I have a Sony NSZ-GT1, and when I bought it , I expected it to be capable of showing the TV signal from my Sony W-4100 tv set, but it didn't . I was pretty disappointed because I dont like the ad-ware of the Comcast cable HD tuner. So, basically, i cant user the picture-in-picture feature of the Google TV. My suggestions is that, for people who don't have Digital Cable or Satellite TV service, but still have a basic cable wire into their house, It would be nice if the Google set-top box could somehow (via USB device with CATV OR via the HDMI connection???) hook into TV sets internal DTV receiver? Also, I was also disappointed that the Google TV remote could control the volume but not the channel changing.... very disappointed. If this isn't possible, would another alternative be the ability to show IP-TV or other over the internet TV signals. The only option I can think of is to buy the "Sony RDR-VXD655 HD VCR" device to replace the Comcast set top box but I want to avoid the cost.