Re: What's missing is how this changes over time...
The convenience is really important - I bought a couple of titles on sony's service a while ago and it was terrible. I'm really happy with itunes, Amazon, Netflix and HBO though - my wife can use them easily and my mother in law can even do quite well (in case you care - my wife is my canonical example of an intelligent person who is averagely tech savvy and my mother in law the intelligent person who is not tech savvy....)