i would like to get a google tv set top box but was wondering if i need a comcast tv connection (cable box) to use it. i have comcast for triple play phone internet tv but don't have a spare cable box for the room i want to put the google set top box in. i was going to use netflix, amazon prime, and other online content as well videos i have on my own on a NAS or usb drive. is it going to be useless or can i get some use out of it? i was looking at the sony nsz-gs7. any other recommendations? thanks in advance.