"TiVo said the Series3 is the first-ever DVR to be "THX certified" by THX Ltd., forcing the product to adopt high-quality audio and video components and output levels."
How much higher quality can the optical audio output and HDMI really be? I don't expect the analog outputs to be used by most serious A/V enthusiasts.
"The Series3 is also designed to support upcoming TiVo features, including more advanced video downloads and other Internet-delivered content."
While takes away differentiating features that used to be the main marketing spin.