Chris L and Wes,
P.T. Anderson should have consulted you guys before making the movie. I am laughing my ass off here.
Or he should have spoken to directors who can pull off more subtle endings. Richard Linklater's "Before Sunset" would have been a good one to study (still one of my favorite endings ever...even though "Before Sunrise" annoyed the piss out of me).
I would have been much happier if the last time we saw Daniel Plainview, he was sitting at dinner quietly - sad, drunk, and maybe slightly wobbly - and he just fell into his soup. A few bubbles come up, and then nothing.