Granted, there are a lot of flaws in this, but...
I'm not so sure I like the notion of purchasing my content a la carte. Sure, I wish I could get more programming that I like, but I also like the idea of finding something I might never have considered ordering when I'm just up in the middle of the night trying to find something on that isn't "Paid Programming." Like tripping across a Chaplin movie I've never seen on TMC or some funky thing on National Geographic.
There's something to be said for serendipity, but if all your programming choices are based on you actively seeking something (and there's definitely room for that if you purchase a bundled programming package), you sort of have to know it's out there. I like accidentally finding things I didn't know were there.
It's kind of like going to a Mom-and-Pop record store (if you can find one anymore). The people there seem to know so much more that anyone in a Big Box store, and they tend to have a lot more choices that are further out toward the edges of the bell curve.
I just feel that a lot of this will drive us more toward homogeneity, and it'll be, ultimately, the advertisers who benefit most of all and us getting served progressively poorer content.