Well, when I say "this" is TV's future, I don't necessarily mean Google TV specifically, but that the central ideas behind the interface, the global search of your local content combined with internet content, etc are all good ones and seem like a natural fit.
The way the iPhone changed mobile phone interfaces, I can see the ideas in GoogleTV changing and heavily influencing TV/DVR/Set Top Box/Game console interfaces in the future (For a variety of reasons, I think it'll take much longer here though, maybe 5-10 years out).