That, and if I could find the movies I want to watch, of course.
The reality for me, at least, is that I cannot watch two hours of streaming video from Netflix without the picture freezing or skipping at some point, even if it's just a little bit.
I love film, and that's unacceptable. I need to either go to the store and get the DVD, rent a download (not streaming) from iTunes, or hit the high seas. I need to watch movies when I want, and I need them to play perfectly.
That rules out Netflix, at least for me, at least for now.