Michael Gartenberg at Macworld says:
"Apple TV sometimes feels like the Rodney Dangerfield of Apple products: it gets no respect. No less than Steve Jobs calls it not a product line, but a hobby. Hobbies are funny, though. Stick with one long enough and it can transform from side interest to full-time business."
Gartenberg's conclusion seems on the money as Apple has just announced that it has sold a million new Apple TVs in about 80 days. (To put this in context as a significant number Windows fan sites are jumping up and down when Microsoft proudly announced they have sold 1.5m WP7 phones in 6 weeks with 10 different phones on 60 carriers in 30 countries. Considering Apple TV is/was a 'hobby' and WP7 a major platform initiative with a 500 million ad budget... )