My reasons:
1) That's a hell of a lot of work.
2) It's gonna take a hell of a long time to do.
3) I don't think many people will want to sit in front of their TV screens and read an entire novel. I've tried numerous times to read e-books on my PC, and I usually lose interest after a few minutes. There's just something about being able to hold it in your hands, ya know?
4) Aren't there copyright laws against doing that?