Just saw a demo on the Google TV and I have to say, there is no way soccer moms and dads are going to use this thing. Its too complicated to get working with your cable box or   satellite  system and relies to heave on the browser interface. The whole thing is a half backed mess. I just don't see this thing becoming part of TV the way it is advertised. They are expecting this thing to be put  directly  into TVs, cable, and  set top  boxes? I don't see it. 
 
For myself, I have been playing with (and even putting together an app) for the Boxee. This thing is cool. And even though I don't see this thing being too big, it has huge potential because, unlike the other internet streaming boxes, it is very easy to add all your RSS feeds to it and even write apps. Sure there are problems with licensing network content etc but once the providers realize that incorporating the ads into the stream itself is the only way to get people to watch it, they will do just that and these streaming players will take off in the popular market. Its already taking off as Netflix has already stated that they are now for all intent a video streaming service that just happens to rent physical DVDs.  
  
And no one wants to have 10 different set top boxes for watching 10 different streaming services providers. Using a single, low energy streaming box that can provide multiple networks is the way of the future. I think Boxee is a first glimpse at doing it right. It will probably flowder and fail to sell but its a great piece of software that is closer to anything else at being able to provide many diffrent and changing internet TV channels in a simple and easy to understand way. 

I think it's interesting as a proof of concept.  I believe in the future it will be incorporated into cable & satellite boxes to remove most of the fuss just like DVRs are today.  Also, I think Google TV is a bit expensive right now, but I expect that future versions will drop considerably.  I only wanted a better streaming device so I picked up a WDTV Live Plus for under $100 and it works well enough for my video and audio needs.  It could use some improvement in certain areas like a few more video codecs and better functionality with image libraries, but for the price I paid, I am happy.  I like some of the ideas behind Google TV, but like a lot of Apple products, this one needs to bake for a few more years before I'll invest in one.