I didn't have a lot of time to play with it last night, but it definitely has potential once more apps support it. I only used it for youtube and can see myself watching a lot more content there with this interface, trumps the DTV interface easily, but is also 10x easier to navigate than the PS3. I will have to test more but I think the Picture Quality is better on the PS3, but it is obviously much better than the HR2x.
I have the Google Music service also so this will be the easiest way to access my music library in the living room and also give me access to their Spotify like library. I look forward to Photo Gallery support.