Likely already been said, but here we go (spoken as an avid reader):
Books, as a broadly general category, are mediocre at best. Not to say they are to be avoided or that good books are over-appreciated, but in a world where you have finite (and perhaps shrinking) time, finding a good book is often a crap-shoot at best (best seller lists are littered with tripe). HBO, on the other hand, has a proven product that rarely misses and, if it does, only does so at half- or full-hour increments. If it's amazing, I'm then free to pick up the book.
So, congratulations to those of you that have all the time in the world and the fortitude to wade through days and pages of trash fiction to find the diamonds in the rough. You "win"; you're so intimidatingly hip and superior. Nonetheless, I'll be over here watching HBO and enjoying the finite free time I have to spend with nature, my family, my dogs and the books I choose to pick up (in part) because of rather than in spite of HBO. Reject the false dichotomy.