It's a really nice addition, especially if you already pay for the service (which I do and I like it). It comes out cheaper than Netflix, though the selection isn't even as good as theirs.

Here's a good comparison chart. Netflix is really doing well in bringing TV to their streaming service. I'd say the ratio of good to bad in their TV selection is much better than the movies, and they have a good amount of TV in HD, including Dollhouse.

I keep meaning to check of Amazon's new service will work with devices like the Tivo. I just do not like watching TV or movies at my computer, despite having a very nice and cushy office chair