It’s pretty clear what happened when you look at the sequence of the shots.
The bell indicates that the next scene is from Tony’s POV, the bell rings when Meadow enters and that’s when the blank screen comes, showing that Tony doesn’t see anything because he’s dead.
Actually the sequence that’s repeated throughout the scene is;
1. Bell rings.
2. Shot of Tony looking at the door to see who came in.
3. The a POV shot showing what Tony sees.
So the ending was you see Meadow entering, with the bell, the quick shot of Tony looking up to see Meadow, then the blank POV shot.
He’s Schrodinger’s Mob Boss. The cat is both alive and dead because the box is closed and will remain closed until Chase decides to cash in with a Sopranos reunion show.
If you see how they eat the onion rings (?), they put them on their tongues like communion wafers and in a studied, religious manner. It was the last supper for them.
Genius ending to a genius show.
"Sopranos" basically opened the door to 20 years of great TV. I'm still binge-watching shows from that era that I stream on Netflix and Amazon Prime. And that's how I take my TV. It's been at least a decade since I watched regular TV with commercials. As soon as I checked out "on demand" streaming TV, I knew it was the future and went all in.
As a side-note, that finale got me back into Journey in a big way. I remember them growing up but was never that big of a fan. I ended up checking out all the Journey albums, including the early ones before Steve Perry joined the band. I've definitely heard "Don't Stop Believing" more times since 2007 than before 2007!
Wow.