Here is a interesting take on the end ( from another board )

"Tony got popped.

That's actually exactly how I thought it would end if he died. It's more or less a first-person perspective, the show revolves around him, so I kind of envisioned that if he did get killed, the show would just be over.

It recalls the brief flashback from last week's episode, when he's talking to Bobby on the lake (paraphrasing): When it happens, you don't see it coming. Everything just goes black."

Awesome ending."

I have to go w/ you Raj...it leaves you wondering.