I am curious about the difference. I understand that with a built-in Tuner, you can go for OTA signals. However, if you are just going to get your HD content from an STB, does it really offer any value? Doesn't the STB have HD hardware? I am not even sure we have any OTA HD content around here (Halifax, Nova Scotia, Canada). Bell ExpressVU seems to have plenty of HD content for now.
Just wondering.

Shane D