It's not that different
It's a different OS version, but it's the same OS, and it's only a point release beyond what's already available in other phones right now, and no doubt it will be available pre-installed with other phones as well as offered as an upgrade.
The different looks aren't all that different (large screen, classic HTC smattering of buttons below) and to be honest it doesn't look particularly attractive.
The FM feature is interesting, but that's the only feature listed that the hardware brings that isn't already in the iPhone. Everything else may be technically distinct to what's already in a lot of phones, and it may be faster, but it's essentially doing the same job.
And not only is it not the first phone to come with Google branding, it's not even the first phone to come with Google branding from this manufacturer.
I'm not saying that it's not an interesting phone or that people shouldn't be excited about it. What I don't understand, though, is the collective orgasm everyone seems to be having because it's a 'Googlephone'. Nothing about it is particularly novel, interesting or special.