although ultimately the ending will necessarily remain ambiguous, after further thought i'm convinced that tony is dead.
in the first episode of the season, with tony and bobby in the boat, they talk about being killed, and bobby says something about how you never see it coming and everything just goes black. and tony recalls this conversation in the penultimate episode lying on the bed.
then there's the bizarre edit i forgot about at the start of the diner scene. it's right out of 2001, actually. tony looks into the diner-- we are looking at tony's face-- then we cut to what he's seeing: himself, seated at the table. that's a very weird thing to do, so why? because for this scene, we the audience are now tony.
the tension builds, and finally, abruptly, tony looks up to see who's coming in the door-- we assume meadow, but we don't see who it is-- and we cut to black. not to the credits, but a solid ten seconds of black silence. as i said before, WE have been whacked, but in this scene, we have been set up to be tony.
so tony's dead. the whole show was about him. it was, effectively, all from his perspective, it was all his world, and the only way his world can end is when he ends. for him, and by extension for us, there is nothing more. there is no more sopranos.