What's nice about Under the Dome is that Stephen King is involved in making the show, so it's still "his" thing. Plus, the book was fine, but it's not like King's stuff is high art. It's a great read, and that's good enough for me.
There is WAY more nudity/sex in True Blood than in the Sookie Stackhouse books. I mean, the books have a tinge of crap romance novel in it to keep the female readership loyal, but the HBO version is made to keep the guys watching the show with the female readers.