Xbox Music/Video?
It's all I use. On my PC, my phone, my tablet and my Xbox. I also have a LoveFilm (postal version) subscription, which gives me a bit of free streaming online. The LoveFilm app on the Xbox is crap compared with Xbox Video. I tried Netflix for 10 minutes when they launched, but that cupboard was bare, even compared with the (compared with Xbox Video) relatively bare LoveFilm cupboard.
All said and done though, the only TV I watch is the news, and since my kid made his appearance a year ago I only watch the occasional film. So I'd love to hear how Xbox Video compares with LoveFilm, Netflix and BlinkBox (which I've not heard of before reading this article).