I am using Mezzmo to play WTV files from my Logitech Revue.
This allows me to use Windows Media Center to record TV shows but I can use Google TV as my universal playback device. (I don't have to switch between google TV and my PC unless I need to setup a new recording in WMC.)

Mezzmo could provide an enhanced experience if the metadata for the WTV files was displayed.

For example WMC displays the name of the show, the episode title, the channel and the original air date.

A complete list of the metadata is available by right clicking a WTV file and viewing the details tab under properties.

Thanks,
Vance